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246 vulnerabilities by zammad
CVE-2026-102490 (GCVE-0-2026-102490)
Vulnerability from nvd – Published: 2026-09-30 16:21 – Updated: 2026-10-02 16:35Title
Undisclosed LPE in Zammad v1.5.0 to v7.1.0-alpha
Summary
All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root.
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:27 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://csirt.divd.nl/DIVD-2026-00015 | third-party-advisory |
| https://csirt.divd.nl/CVE-2026-102490 | third-party-advisory |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zammad GmbH | Zammad |
Affected:
1.5.0 , < 7.1.0-alpha
(semver)
Unknown: * , < 1.5.0 (semver) |
Date Public
2026-09-29 20:00
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CVE-2026-102489 (GCVE-0-2026-102489)
Vulnerability from nvd – Published: 2026-09-30 16:21 – Updated: 2026-10-02 16:36Title
Undisclosed RCE in Zammad v6.3 and higher
Summary
Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions.
Severity
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:27 UTC
CWE
- CWE-384 - Session Fixation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://csirt.divd.nl/DIVD-2026-00015 | third-party-advisory |
| https://csirt.divd.nl/CVE-2026-102489 | third-party-advisory |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zammad GmbH | Zammad |
Unknown:
* , < 6.3.0
(semver)
Affected: 6.3.0 , < 6.5.4 (semver) Unaffected: 7.0.0 , < * (semver) |
Date Public
2026-09-29 20:00
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CVE-2026-84465 (GCVE-0-2026-84465)
Vulnerability from nvd – Published: 2026-09-25 18:19 – Updated: 2026-09-29 18:08
VLAI
EPSS
VEX
Title
Zammad: S/MIME signature verification allows forged sender impersonation
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same "validly signed" indicator as a genuine message from the real sender, even though the attacker never had access to that sender's actual certificate or private key. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:07 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/9a07d0b82… | x_refsource_MISC |
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CVE-2026-84464 (GCVE-0-2026-84464)
Vulnerability from nvd – Published: 2026-09-25 18:18 – Updated: 2026-09-25 19:03
VLAI
EPSS
VEX
Title
Zammad: IDOR in External Data Source rendering exposes ticket, user, group, and organization data
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's External Data Source feature, used to look up records from an external system, did not properly verify whether a user was allowed to see a specific ticket, user, group, or organization before including its details in a request to that external system. An authenticated user, including one with only basic customer access, could exploit this by referencing another record's ID, and thereby view details of tickets, customer accounts, teams, or organizations that did not belong to them. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:03 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/34bdf4627… | x_refsource_MISC |
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CVE-2026-84463 (GCVE-0-2026-84463)
Vulnerability from nvd – Published: 2026-09-25 18:19 – Updated: 2026-09-29 19:42
VLAI
EPSS
VEX
Title
Zammad: Stored HTML injection in Knowledge Base video widget enables forced session switching via unescaped iframe attribute
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, a user with Knowledge Base editing rights for a category can embed a video widget in a published answer with a specially crafted value. When the answer is rendered, that value is inserted into the page's HTML without being escaped for its attribute context, allowing it to break out and inject additional HTML into the page. When another user who has permission to switch between user sessions views the affected answer, the injected HTML causes their browser to silently send a request to Zammad's session-switching endpoint using their own active credentials. This results in switching their session to an account chosen by the person who wrote the Knowledge Base answer. No action is required from the viewer beyond opening the published answer. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:42 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/f7a97ea20… | x_refsource_MISC |
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CVE-2026-84461 (GCVE-0-2026-84461)
Vulnerability from nvd – Published: 2026-09-25 18:21 – Updated: 2026-09-25 18:41
VLAI
EPSS
VEX
Title
Zammad: Missing rate limiting allows password brute-forcing during two-factor login
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account without triggering Zammad's normal lockout or rate limiting. The response also revealed whether a guess was correct, even before two-factor authentication was checked. This made it possible to brute-force weak or reused passwords. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:41 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/d51254f1c… | x_refsource_MISC |
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CVE-2026-84460 (GCVE-0-2026-84460)
Vulnerability from nvd – Published: 2026-09-25 18:14 – Updated: 2026-09-29 18:09
VLAI
EPSS
VEX
Title
Zammad: Missing Authorization in TagsController#list Allows Cross-Object Tag Enumeration
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, any authenticated user can call the REST endpoint for getting a tag list and receive the tag names for the given ticket, regardless of whether they have access to that ticket. Tags are an internal categorization feature and may contain sensitive labels. Ticket IDs are sequential integers, making bulk enumeration straightforward. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:08 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/13217eb6b… | x_refsource_MISC |
| https://github.com/zammad/zammad/commit/d1a5eabdd… | x_refsource_MISC |
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CVE-2026-84458 (GCVE-0-2026-84458)
Vulnerability from nvd – Published: 2026-09-25 18:15 – Updated: 2026-09-25 19:05
VLAI
EPSS
VEX
Title
Zammad: Account takeover via unverified email matching during SSO auto-link
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when the "Automatic account link on initial logon" setting is enabled, Zammad binds an incoming third-party (SSO) identity to an existing local account by matching the email address the identity provider reports, without verifying that the provider actually confirmed ownership of that email. An attacker who controls any identity at a configured provider, including, by default, any Azure AD tenant via Zammad's multi-tenant Microsoft 365 /common app registration, can set that identity's email to a victim's address, authenticate, and be logged in as the victim. This bypasses the victim's local password entirely and affects any existing account, including agents and administrators. Zammad will honor the xms_edov ID token claim when email verification is required in the Microsoft 365 setting, treating a missing claim as unverified. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:04 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/0dba387df… | x_refsource_MISC |
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CVE-2026-63216 (GCVE-0-2026-63216)
Vulnerability from nvd – Published: 2026-09-25 18:16 – Updated: 2026-09-29 19:41
VLAI
EPSS
VEX
Title
Zammad: Stored XSS via unescaped option labels in the object attribute options context UI
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, unsanitized option labels are rendered in the configuration dialogs of AI Agents within Zammad's admin UI. When rendering the list of selected options, the option label is output as raw HTML without escaping. An attacker who can control an option label, for example by setting a malicious string as a user or organization name used in a relation attribute, or by supplying a crafted custom attribute option value, can inject arbitrary HTML and JavaScript. The payload executes in the browser of any admin or agent who opens the affected object attribute configuration view. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:41 UTC
CWE
- CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/74b4fd4db… | x_refsource_MISC |
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CVE-2026-63208 (GCVE-0-2026-63208)
Vulnerability from nvd – Published: 2026-09-25 18:23 – Updated: 2026-09-25 18:42
VLAI
EPSS
VEX
Title
Zammad: Microsoft Graph error logs expose partially masked OAuth access tokens
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when a Microsoft Graph request fails, Zammad logs the error including the authentication token used to access the mailbox. The system attempts to hide this token in the log, but the masking is incomplete: for the token format Microsoft uses (JWT), only the first part is hidden, while the remaining parts remain readable in plain text. A Zammad admin with Microsoft Graph channel access can view these logs and see the partial token, which may reveal sensitive claims such as the account scope, tenant, or timing, and could assist in reconstructing the full token while it is still valid. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:42 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/2be46473e… | x_refsource_MISC |
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CVE-2026-63207 (GCVE-0-2026-63207)
Vulnerability from nvd – Published: 2026-09-25 18:20 – Updated: 2026-09-29 18:06
VLAI
EPSS
VEX
Title
Zammad: Sensitive Information Exposure in Integration Administration API
Summary
Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, an authenticated administrator can obtain stored integration credentials in cleartext through the integration administration API. Certain responses do not consistently mask sensitive fields, so configured secrets can be returned in plain text instead of the expected masked placeholder. Both the LDAP and Exchange integrations are affected. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:05 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/fab2e2e9d… | x_refsource_MISC |
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CVE-2026-63206 (GCVE-0-2026-63206)
Vulnerability from nvd – Published: 2026-09-25 18:14 – Updated: 2026-09-25 19:46
VLAI
EPSS
VEX
Title
Zammad: Remote image tracking bypass via shortened URL scheme
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's HTML sanitizer, which blocks remote images in ticket articles and email views, can be bypassed using a shortened URL format that omits the double slash after the scheme (for example a shortened HTTP URL instead of a shortened HTTP URL). Modern browsers treat both forms as equivalent remote URLs. As a result, an attacker who sends a crafted email or ticket can cause the recipient's browser to silently load an image from an external server, revealing when and by whom the ticket was opened. Zammad's "remote content blocked" warning is not shown because the sanitizer does not recognize the shortened form as remote. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:46 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/a5878f37e… | x_refsource_MISC |
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CVE-2026-63205 (GCVE-0-2026-63205)
Vulnerability from nvd – Published: 2026-09-25 18:13 – Updated: 2026-09-29 19:40
VLAI
EPSS
VEX
Title
Zammad: Channel admins can read unauthorized attachments via signature rich-text body
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when creating or updating an email signature, Zammad processes inline images referenced in the signature body. If a signature body contains an HTML img tag pointing to any existing attachment, the system copies that attachment into a new signature-owned record, without checking whether the user has permission to access the original attachment. The newly created copy is then downloadable by the same channel-admin user, because attachment access is determined by the copy's owner (the signature), not the original object (e.g., a ticket or knowledge-base article). This allows a user with any of the admin.channel_email, admin.channel_google, admin.channel_microsoft365, or admin.channel_microsoft_graph permissions to read attachments they would otherwise be denied access to, such as ticket attachments belonging to groups they are not a member of. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:40 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/f3e4da836… | x_refsource_MISC |
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CVE-2026-63204 (GCVE-0-2026-63204)
Vulnerability from nvd – Published: 2026-09-25 18:22 – Updated: 2026-09-25 18:41
VLAI
EPSS
VEX
Title
Zammad: Authenticated agents can read AI summary error messages from inaccessible tickets
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, an authenticated user with agent permissions can supply an arbitrary AI analytics run identifier to the ticket summarize endpoint and receive the AI provider error message stored for that run, even if the run belongs to a ticket the agent is not authorized to access. The disclosure is limited to the provider error string; ticket content is not exposed. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:41 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/849191c32… | x_refsource_MISC |
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CVE-2026-63006 (GCVE-0-2026-63006)
Vulnerability from nvd – Published: 2026-09-25 18:23 – Updated: 2026-09-29 18:03
VLAI
EPSS
VEX
Title
Zammad: HTML sanitizer API path allowlist bypass via interior path traversal in img src/srcset
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, attacker-controlled HTML in inbound emails or tickets could bypass the image URL sanitizer using path traversal sequences. When an authenticated agent views the content, the browser resolves the URL to a protected API endpoint and sends the request with the agent's session cookie, enabling side effects such as forced logout without any user interaction. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:03 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/856af85c1… | x_refsource_MISC |
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CVE-2026-61855 (GCVE-0-2026-61855)
Vulnerability from nvd – Published: 2026-09-25 18:21 – Updated: 2026-09-25 19:02
VLAI
EPSS
VEX
Title
Zammad: Invalid PGP Detached Signatures Reported as Good Signature on Inbound Mail
Summary
Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, under certain conditions, Zammad's verification of inbound PGP-signed email can mark a message as carrying a valid ("Good") PGP signature from a registered sender key, even though the displayed message content is not actually covered by that signature. As a result, the inbound article may be stored with a successful signature status that does not reflect the authenticity of the shown content. This can mislead agents who rely on the signature indicator when assessing the trustworthiness of incoming mail. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:02 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/dd22716ce… | x_refsource_MISC |
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CVE-2026-84462 (GCVE-0-2026-84462)
Vulnerability from nvd – Published: 2026-09-25 17:29 – Updated: 2026-09-25 18:11
VLAI
EPSS
VEX
Title
Zammad: AI Agent template sanitizer bypass leads to remote code execution
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, a security filter that protects Zammad's AI Agent configuration can be bypassed by entering specially crafted text into one of an AI Agent's fields. An administrator with permission to create or edit AI Agents could exploit this to run arbitrary commands on the server that hosts Zammad, potentially reading, modifying, or destroying all data stored on that server. No interaction from other users is needed; the malicious code runs automatically the next time the affected AI Agent processes a ticket. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:11 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/e3b0c8df9… | x_refsource_MISC |
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CVE-2026-65828 (GCVE-0-2026-65828)
Vulnerability from nvd – Published: 2026-09-25 17:28 – Updated: 2026-09-25 18:38
VLAI
EPSS
VEX
Title
Zammad: Pending upload deletion bypass via legacy attachment endpoint
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the legacy destroy_form action on AttachmentsController deletes UploadCache Store records based solely on a user-supplied form_id without verifying that the requesting user owns those records. An authenticated attacker who learns another user's pending-upload UUID can silently remove temporary file uploads before the victim submits their ticket or article. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:38 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/3b755736f… | x_refsource_MISC |
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CVE-2026-61525 (GCVE-0-2026-61525)
Vulnerability from nvd – Published: 2026-09-25 17:11 – Updated: 2026-09-25 17:31
VLAI
EPSS
VEX
Title
Zammad: Arbitrary File Deletion via Unvalidated Session Identifier in Long Polling Controller
Summary
Zammad is a web based open source helpdesk/customer support system. In 7.0.2 and 7.1.0, zammad's session management for websocket and long-polling connections is susceptible to a path traversal attack. Session identifiers supplied by the client are insufficiently validated before being used to construct internal file paths. When the file-based session store is active (the default configuration), an authenticated attacker can manipulate the session identifier to reference locations outside the intended storage directory, leading to the deletion of arbitrary files and directories on the server. Exploitation requires only a low-privilege authenticated session and a single crafted request. Instances configured to use the Redis-based session store are not affected. This issue is fixed in versions 7.0.3 and 7.1.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 17:30 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/cf3425712… | x_refsource_MISC |
| https://github.com/zammad/zammad/commit/f78ef2434… | x_refsource_MISC |
Impacted products
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CVE-2026-102490 (GCVE-0-2026-102490)
Vulnerability from cvelistv5 – Published: 2026-09-30 16:21 – Updated: 2026-10-02 16:35Title
Undisclosed LPE in Zammad v1.5.0 to v7.1.0-alpha
Summary
All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root.
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:27 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://csirt.divd.nl/DIVD-2026-00015 | third-party-advisory |
| https://csirt.divd.nl/CVE-2026-102490 | third-party-advisory |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zammad GmbH | Zammad |
Affected:
1.5.0 , < 7.1.0-alpha
(semver)
Unknown: * , < 1.5.0 (semver) |
Date Public
2026-09-29 20:00
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CVE-2026-102489 (GCVE-0-2026-102489)
Vulnerability from cvelistv5 – Published: 2026-09-30 16:21 – Updated: 2026-10-02 16:36Title
Undisclosed RCE in Zammad v6.3 and higher
Summary
Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions.
Severity
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:27 UTC
CWE
- CWE-384 - Session Fixation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://csirt.divd.nl/DIVD-2026-00015 | third-party-advisory |
| https://csirt.divd.nl/CVE-2026-102489 | third-party-advisory |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zammad GmbH | Zammad |
Unknown:
* , < 6.3.0
(semver)
Affected: 6.3.0 , < 6.5.4 (semver) Unaffected: 7.0.0 , < * (semver) |
Date Public
2026-09-29 20:00
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CVE-2026-63208 (GCVE-0-2026-63208)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:23 – Updated: 2026-09-25 18:42
VLAI
EPSS
VEX
Title
Zammad: Microsoft Graph error logs expose partially masked OAuth access tokens
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when a Microsoft Graph request fails, Zammad logs the error including the authentication token used to access the mailbox. The system attempts to hide this token in the log, but the masking is incomplete: for the token format Microsoft uses (JWT), only the first part is hidden, while the remaining parts remain readable in plain text. A Zammad admin with Microsoft Graph channel access can view these logs and see the partial token, which may reveal sensitive claims such as the account scope, tenant, or timing, and could assist in reconstructing the full token while it is still valid. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:42 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/2be46473e… | x_refsource_MISC |
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CVE-2026-63006 (GCVE-0-2026-63006)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:23 – Updated: 2026-09-29 18:03
VLAI
EPSS
VEX
Title
Zammad: HTML sanitizer API path allowlist bypass via interior path traversal in img src/srcset
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, attacker-controlled HTML in inbound emails or tickets could bypass the image URL sanitizer using path traversal sequences. When an authenticated agent views the content, the browser resolves the URL to a protected API endpoint and sends the request with the agent's session cookie, enabling side effects such as forced logout without any user interaction. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:03 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/856af85c1… | x_refsource_MISC |
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CVE-2026-63204 (GCVE-0-2026-63204)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:22 – Updated: 2026-09-25 18:41
VLAI
EPSS
VEX
Title
Zammad: Authenticated agents can read AI summary error messages from inaccessible tickets
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, an authenticated user with agent permissions can supply an arbitrary AI analytics run identifier to the ticket summarize endpoint and receive the AI provider error message stored for that run, even if the run belongs to a ticket the agent is not authorized to access. The disclosure is limited to the provider error string; ticket content is not exposed. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:41 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/849191c32… | x_refsource_MISC |
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CVE-2026-61855 (GCVE-0-2026-61855)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:21 – Updated: 2026-09-25 19:02
VLAI
EPSS
VEX
Title
Zammad: Invalid PGP Detached Signatures Reported as Good Signature on Inbound Mail
Summary
Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, under certain conditions, Zammad's verification of inbound PGP-signed email can mark a message as carrying a valid ("Good") PGP signature from a registered sender key, even though the displayed message content is not actually covered by that signature. As a result, the inbound article may be stored with a successful signature status that does not reflect the authenticity of the shown content. This can mislead agents who rely on the signature indicator when assessing the trustworthiness of incoming mail. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:02 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/dd22716ce… | x_refsource_MISC |
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CVE-2026-84461 (GCVE-0-2026-84461)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:21 – Updated: 2026-09-25 18:41
VLAI
EPSS
VEX
Title
Zammad: Missing rate limiting allows password brute-forcing during two-factor login
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account without triggering Zammad's normal lockout or rate limiting. The response also revealed whether a guess was correct, even before two-factor authentication was checked. This made it possible to brute-force weak or reused passwords. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 18:41 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/d51254f1c… | x_refsource_MISC |
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CVE-2026-63207 (GCVE-0-2026-63207)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:20 – Updated: 2026-09-29 18:06
VLAI
EPSS
VEX
Title
Zammad: Sensitive Information Exposure in Integration Administration API
Summary
Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, an authenticated administrator can obtain stored integration credentials in cleartext through the integration administration API. Certain responses do not consistently mask sensitive fields, so configured secrets can be returned in plain text instead of the expected masked placeholder. Both the LDAP and Exchange integrations are affected. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:05 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/fab2e2e9d… | x_refsource_MISC |
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CVE-2026-84465 (GCVE-0-2026-84465)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:19 – Updated: 2026-09-29 18:08
VLAI
EPSS
VEX
Title
Zammad: S/MIME signature verification allows forged sender impersonation
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same "validly signed" indicator as a genuine message from the real sender, even though the attacker never had access to that sender's actual certificate or private key. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:07 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/9a07d0b82… | x_refsource_MISC |
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CVE-2026-84463 (GCVE-0-2026-84463)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:19 – Updated: 2026-09-29 19:42
VLAI
EPSS
VEX
Title
Zammad: Stored HTML injection in Knowledge Base video widget enables forced session switching via unescaped iframe attribute
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, a user with Knowledge Base editing rights for a category can embed a video widget in a published answer with a specially crafted value. When the answer is rendered, that value is inserted into the page's HTML without being escaped for its attribute context, allowing it to break out and inject additional HTML into the page. When another user who has permission to switch between user sessions views the affected answer, the injected HTML causes their browser to silently send a request to Zammad's session-switching endpoint using their own active credentials. This results in switching their session to an account chosen by the person who wrote the Knowledge Base answer. No action is required from the viewer beyond opening the published answer. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:42 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/f7a97ea20… | x_refsource_MISC |
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CVE-2026-84464 (GCVE-0-2026-84464)
Vulnerability from cvelistv5 – Published: 2026-09-25 18:18 – Updated: 2026-09-25 19:03
VLAI
EPSS
VEX
Title
Zammad: IDOR in External Data Source rendering exposes ticket, user, group, and organization data
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's External Data Source feature, used to look up records from an external system, did not properly verify whether a user was allowed to see a specific ticket, user, group, or organization before including its details in a request to that external system. An authenticated user, including one with only basic customer access, could exploit this by referencing another record's ID, and thereby view details of tickets, customer accounts, teams, or organizations that did not belong to them. This issue is fixed in version 7.1.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 19:03 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/34bdf4627… | x_refsource_MISC |
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