Common Weakness Enumeration

CWE-288

Allowed

Authentication Bypass Using an Alternate Path or Channel

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

1227 vulnerabilities reference this CWE, most recent first.

CVE-2026-81906 (GCVE-0-2026-81906)

Vulnerability from cvelistv5 – Published: 2026-09-10 23:20 – Updated: 2026-09-11 14:27
VLAI
Title
[UNREVIEWED] OAuth Callback Login Bypasses Deactivated-Account Checks
Summary
Concrete CMS OAuth callback login path prior to version 9.5.3 did not check whether an account was active or email-validated before establishing a session. A deactivated or unvalidated user with an existing OAuth binding could complete authentication and receive a session that was fully authenticated for the callback response, with the login recorded and login events dispatched. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori from Tenzai for reporting.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 14:26 UTC
CWE
  • CWE-288 - Authentication bypass using an alternate path or channel
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 5.0.0 , ≤ 9.5.2 (git)
Create a notification for this product.
Credits
tenzai
Show details on NVD website
To clipboard 

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CVE-2026-81868 (GCVE-0-2026-81868)

Vulnerability from cvelistv5 – Published: 2026-09-17 15:36 – Updated: 2026-09-23 18:46
VLAI
Title
Steeltoe: Header-forwarded client cert lacks proof of private-key possession
Summary
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. Prior to 4.3.0, Steeltoe.Security.Authorization.Certificate deployments using AddOrgAndSpacePolicies() and UseCertificateAuthorization() trust the public certificate supplied in the X-Client-Cert request header without proving possession of the corresponding private key. Common Cloud Foundry routers do not remove this header from inbound requests. When inbound requests are not restricted to a known trusted proxy source IP, an attacker who obtains the public certificate of an application instance in the target organization or space and can reach the application can spoof X-Client-Cert to bypass the SameOrg and SameSpace policies for the certificate validity period. This issue is fixed in version 4.3.0.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 18:32 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-81796 (GCVE-0-2026-81796)

Vulnerability from cvelistv5 – Published: 2026-09-10 14:23 – Updated: 2026-09-21 10:58 X_Open Source
VLAI
Title
WordPress WP Travel plugin <= 12.0.3 - Broken Authentication vulnerability
Summary
Authentication Bypass Using an Alternate Path or Channel vulnerability in WEN Solutions WP Travel wp-travel allows Password Recovery Exploitation.This issue affects WP Travel: from n/a through 12.0.3.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 20:36 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
WEN Solutions WP Travel Affected: 0 , ≤ 12.0.3 (custom)
Create a notification for this product.
Date Public
2026-09-08 12:08
Credits
Cid_Kagenou_Sama | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-81787 (GCVE-0-2026-81787)

Vulnerability from cvelistv5 – Published: 2026-09-10 14:23 – Updated: 2026-09-10 17:47
VLAI
Title
WordPress IMPress for IDX Broker plugin <= 3.3.0 - Broken Authentication vulnerability
Summary
Unauthenticated Broken Authentication in IMPress for IDX Broker <= 3.3.0 versions.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 17:46 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
IDX Broker IMPress for IDX Broker Affected: n/a , ≤ 3.3.0 (custom)
Create a notification for this product.
Credits
HaiND | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-81783 (GCVE-0-2026-81783)

Vulnerability from cvelistv5 – Published: 2026-09-10 14:23 – Updated: 2026-09-10 14:56
VLAI
Title
WordPress MailMunch – Grow your Email List plugin <= 3.2.5 - Broken Authentication vulnerability
Summary
Subscriber Broken Authentication in MailMunch – Grow your Email List <= 3.2.5 versions.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:56 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
mailmunch MailMunch – Grow your Email List Affected: n/a , ≤ 3.2.5 (custom)
Create a notification for this product.
Credits
Jakub Herman | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-81168 (GCVE-0-2026-81168)

Vulnerability from cvelistv5 – Published: 2026-09-02 12:32 – Updated: 2026-09-02 18:58
VLAI
Title
CAPTCHA Protected Page - Moderately critical - Cookie Forgery - SA-CONTRIB-2026-105
Summary
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal CAPTCHA Protected Page allows Functionality Bypass. This issue affects CAPTCHA Protected Page versions: from 0.0.0 to 1.0.2.
Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 18:58 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
Drupal CAPTCHA Protected Page Affected: 0.0.0 , < 1.0.2 (semver)
Create a notification for this product.
Date Public
2026-08-26 17:34
Credits
lovasoa Carlo Miguel Agno (carlagno) Mark Jayson Gruta (mjgruta) Swan Kalata (akalata) Carlo Miguel Agno (carlagno) Greg Knaddison (greggles) Heine Deelstra (heine) Juraj Nemec (poker10) Jess (xjm)
Show details on NVD website
To clipboard 

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CVE-2026-79680 (GCVE-0-2026-79680)

Vulnerability from cvelistv5 – Published: 2026-09-24 10:56 – Updated: 2026-09-24 12:18
VLAI
Title
Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module
Summary
Authentication bypass vulnerability in the password authentication mechanism of the Qt VNC Server module. An attacker using a specially modified VNC client that violates the RFB protocol can bypass Qt VNC Server's password authentication and gain unauthorized remote access to the shared application, compromising the confidentiality and integrity of the session.
Severity
4.5 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/V:D/RE:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 12:17 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
qt qt Affected: 6.4.0 , < 6.8.9 (python)
Affected: 6.9.0 , < 6.11.3 (python)
    cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
    cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-78259 (GCVE-0-2026-78259)

Vulnerability from cvelistv5 – Published: 2026-08-24 21:31 – Updated: 2026-08-25 19:03
VLAI
Title
WordPress WPLegalPages plugin <= 3.7.0 - Broken Authentication vulnerability
Summary
Unauthenticated Broken Authentication in WPLegalPages <= 3.7.0 versions.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 19:02 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
WP Legal Pages WPLegalPages Affected: n/a , ≤ 3.7.0 (custom)
Create a notification for this product.
Credits
HieuPenguinnn | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-76943 (GCVE-0-2026-76943)

Vulnerability from cvelistv5 – Published: 2026-08-27 21:50 – Updated: 2026-08-28 14:13
VLAI
Title
Xiiaozet LK100W Authentication Bypass Using an Alternate Path or Channel
Summary
Xiiaozet LK100Wt contains an authentication weakness within an administrative service that may allow an attacker to bypass intended access controls and obtain command execution capabilities. Successful exploitation could allow unauthorized interaction with privileged functionality and may lead to complete device compromise.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 13:48 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Xiiaozet Xiiaozet LK100W Affected: 0 , < 2.1.240 (custom)
Unaffected: 2.1.240
Create a notification for this product.
Credits
Byron Guernsey of Okachobi, LLC reported this vulnerability to CISA.
Show details on NVD website
To clipboard 

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CVE-2026-76169 (GCVE-0-2026-76169)

Vulnerability from cvelistv5 – Published: 2026-09-04 09:51 – Updated: 2026-09-04 16:20
VLAI
Title
fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers
Summary
fastify versions >= 4.0.0 and before 5.12.2 can route a malformed URL sent under one plugin prefix to the custom not-found handler of a different sibling plugin, and invoke it without the preHandler hook declared for that handler. The internal not-found router for encapsulated handlers dispatches malformed paths through a single shared handler pointer before URL decoding, ignoring the prefix and skipping the selected handler's normal lifecycle. An unauthenticated attacker can therefore reach an authentication-protected private fallback through an unrelated public prefix and read its full response, bypassing the authentication hook and breaking prefix encapsulation. Users should upgrade to fastify 5.12.2 or later.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 16:18 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
Vendor Product Version
fastify fastify Affected: 4.0.0 , < 5.12.2 (semver)
Unaffected: 5.12.2 (semver)
Create a notification for this product.
Credits
vvvvvvvvvvitel mcollina UlisesGascon schecthellraiser606 B1gN0Se
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design

Funnel all access through a single choke point to simplify how users can access a resource. For every access, perform a check to determine if the user has permissions to access the resource.

CAPEC-127: Directory Indexing

An adversary crafts a request to a target that results in the target listing/indexing the content of a directory as output. One common method of triggering directory contents as output is to construct a request containing a path that terminates in a directory name rather than a file name since many applications are configured to provide a list of the directory's contents when such a request is received. An adversary can use this to explore the directory tree on a target as well as learn the names of files. This can often end up revealing test files, backup files, temporary files, hidden files, configuration files, user accounts, script contents, as well as naming conventions, all of which can be used by an attacker to mount additional attacks.

CAPEC-665: Exploitation of Thunderbolt Protection Flaws

An adversary leverages a firmware weakness within the Thunderbolt protocol, on a computing device to manipulate Thunderbolt controller firmware in order to exploit vulnerabilities in the implementation of authorization and verification schemes within Thunderbolt protection mechanisms. Upon gaining physical access to a target device, the adversary conducts high-level firmware manipulation of the victim Thunderbolt controller SPI (Serial Peripheral Interface) flash, through the use of a SPI Programing device and an external Thunderbolt device, typically as the target device is booting up. If successful, this allows the adversary to modify memory, subvert authentication mechanisms, spoof identities and content, and extract data and memory from the target device. Currently 7 major vulnerabilities exist within Thunderbolt protocol with 9 attack vectors as noted in the Execution Flow.

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