Common Weakness Enumeration
CWE-347
AllowedImproper Verification of Cryptographic Signature
Abstraction: Base · Status: Draft
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
1414 vulnerabilities reference this CWE, most recent first.
CVE-2026-59112 (GCVE-0-2026-59112)
Vulnerability from cvelistv5 – Published: 2026-08-10 13:57 – Updated: 2026-08-10 17:55
VLAI
EPSS
VEX
Title
Signature validation vulnerability affecting DigiDoc applications
Summary
Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 17:55 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-eid/libdigidocpp/pull/690 | patch |
| https://www.id.ee/en/article/ria-soovitab-kasutaj… | vendor-advisory |
| https://www.ria.ee/blogi/digidoc-rakendustes-esin… | government-resource |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Estonian Information System Authority (RIA) | libdigidocpp |
Affected:
4.1.0 , < 4.2.1
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc4 |
Affected:
4.7.0 , < 4.8.2
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc |
Affected:
2.7.0 , < 2.7.2
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc |
Affected:
2.8.0 , < 2.8.1
(semver)
|
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CVE-2026-58426 (GCVE-0-2026-58426)
Vulnerability from cvelistv5 – Published: 2026-07-03 20:54 – Updated: 2026-07-06 15:07
VLAI
EPSS
VEX
Title
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Summary
Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 15:07 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/go-gitea/gitea/security/adviso… | vendor-advisory |
| https://github.com/go-gitea/gitea/pull/37707 | patch |
| https://github.com/go-gitea/gitea/releases/tag/v1.26.2 | release-notes |
| https://blog.gitea.com/release-of-1.26.2/ | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Gitea | Gitea Open Source Git Server |
Affected:
1.22.0 , ≤ 1.26.1
(semver)
|
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CVE-2026-58262 (GCVE-0-2026-58262)
Vulnerability from cvelistv5 – Published: 2026-08-07 22:00 – Updated: 2026-08-12 22:15
VLAI
EPSS
VEX
Title
Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum
Summary
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS aggregate-signature check, so a malicious or compromised block producer can set them to reach the required quorum while gathering fewer genuine validator signatures than the protocol demands. As a result, nodes that import or intercept the header accept it as correctly signed without a real two-thirds quorum, weakening consensus safety and undermining finality. This issue is fixed in version 1.7.20.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:08 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/klever-io/klever-go/security/a… | x_refsource_CONFIRM |
| https://github.com/klever-io/klever-go/commit/a11… | x_refsource_MISC |
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CVE-2026-58200 (GCVE-0-2026-58200)
Vulnerability from cvelistv5 – Published: 2026-09-15 16:27 – Updated: 2026-09-15 19:45
VLAI
EPSS
VEX
Title
@jhb.software/payload-cloudinary-plugin: Arbitrary Cloudinary API Parameter Signing
Summary
Payload Plugins is a collection of plugins designed to enhance Payload CMS. From 0.3.0 until 0.4.0, @jhb.software/payload-cloudinary-plugin deployments with clientUploads enabled expose POST /api/cloudinary-generate-signature, whose handler in cloudinary/src/getGenerateSignature.ts passes attacker-controlled body.paramsToSign directly to cloudinary.utils.api_sign_request without a key allowlist, collection policy, timestamp freshness check, or configured-folder enforcement. Any authenticated Payload user can obtain a valid Cloudinary HMAC-SHA1 signature for unauthorized parameters such as overwrite, type, notification_url, invalidate, folder, and public_id. The signature can authorize asset replacement, upload visibility changes, callbacks to attacker-selected URLs, cache invalidation, and uploads outside the intended folder. The client-visible Cloudinary API key is expected by the upload design, but the unrestricted server-side signature supplies the authorization value needed to complete these operations. This vulnerability is fixed in 0.4.0.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 18:57 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/jhb-software/payload-plugins/s… | x_refsource_CONFIRM |
| https://github.com/jhb-software/payload-plugins/p… | x_refsource_MISC |
| https://github.com/jhb-software/payload-plugins/c… | x_refsource_MISC |
| https://github.com/jhb-software/payload-plugins/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jhb-software | payload-plugins |
Affected:
>= 0.3.0, < 0.4.0
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CVE-2026-58085 (GCVE-0-2026-58085)
Vulnerability from cvelistv5 – Published: 2026-08-19 07:38 – Updated: 2026-08-27 16:03
VLAI
EPSS
VEX
Title
Missing MAC validation in wg(4) packet decryption
Summary
After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag.
A remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.
A remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 16:03 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-07-29 22:40
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CVE-2026-57910 (GCVE-0-2026-57910)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:47 – Updated: 2026-09-09 14:57
VLAI
EPSS
VEX
Title
WatchGuard Agent improper authentication allows unauthenticated remote code execution
Summary
Improper authentication in the WatchGuard Agent allows an unauthenticated attacker with network access to cause the agent to execute arbitrary code with elevated privileges.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 12:53 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://psirt.watchguard.com/CVE-2026-57910 | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| WatchGuard | WatchGuard Agent |
Affected:
0 , < 1.17.01.0000
(semver)
|
|
| WatchGuard | WatchGuard Agent |
Affected:
0 , < 1.25.13.0000
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|
| WatchGuard | WatchGuard Agent |
Affected:
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Date Public
2026-08-25 11:47
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CVE-2026-57178 (GCVE-0-2026-57178)
Vulnerability from cvelistv5 – Published: 2026-09-24 17:25 – Updated: 2026-09-28 17:34
VLAI
EPSS
VEX
Title
social-auth-core: VK App backend accepts unsigned callback data when auth_key is missing
Summary
Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the `vk-app` backend accepted VK application callback data without verifying the callback signature when the `auth_key` parameter was omitted. Applications using this backend could treat unsigned attacker-controlled data as a verified VK identity. An attacker could choose callback fields such as `viewer_id`, `access_token`, `api_id`, and `api_result`, potentially allowing authentication as an arbitrary VK user ID. The issue affects only applications using the `vk-app` backend. The issue has been fixed in version 5.0.0 by requiring `auth_key` to be present and valid before callback data is trusted.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 17:34 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/python-social-auth/social-core… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| python-social-auth | social-core |
Affected:
< 5.0.0
|
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CVE-2026-57122 (GCVE-0-2026-57122)
Vulnerability from cvelistv5 – Published: 2026-09-14 15:02 – Updated: 2026-09-14 18:11
VLAI
EPSS
VEX
Title
PraisonAI: Webhook signature verification skipped (fail-open) when secret unset, allowing forged inbound webhooks (WhatsApp & Linear bots)
Summary
PraisonAI is a multi-agent teams system. Prior to 4.6.59, the WhatsApp and Linear bot webhook handlers verify HMAC signatures only when WHATSAPP_APP_SECRET or LINEAR_WEBHOOK_SECRET is configured and otherwise parse and dispatch unsigned request bodies. A remote unauthenticated client that reaches the webhook route can forge messages, comments, or agent-session events, impersonate platform users, influence agent prompts and actions, and disrupt bot processing. This issue is fixed in 4.6.59.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 17:06 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/MervinPraison/PraisonAI/securi… | x_refsource_CONFIRM |
| https://github.com/MervinPraison/PraisonAI/commit… | x_refsource_MISC |
| https://github.com/MervinPraison/PraisonAI/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MervinPraison | PraisonAI |
Affected:
< 4.6.59
|
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CVE-2026-57098 (GCVE-0-2026-57098)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:10 – Updated: 2026-10-01 22:52
VLAI
EPSS
VEX
Title
Microsoft Remote Desktop App for Windows Information Disclosure Vulnerability
Summary
Improper verification of cryptographic signature in Windows RDP Client allows an unauthorized attacker to disclose information over a network.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 19:52 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Remote Desktop client for Windows Desktop |
Affected:
1.2.0.0 , < 1.2.7279.0
(custom)
cpe:2.3:a:microsoft:remote_desktop:*:*:*:*:*:windows:*:* |
Date Public
2026-09-08 14:00
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CVE-2026-56727 (GCVE-0-2026-56727)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:02 – Updated: 2026-09-25 17:42
VLAI
EPSS
VEX
Title
Zammad: PGP signature spoofing via unvalidated verification return
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary In Zammad's inbound PGP email processing, the return value of the gpg verification call was silently discarded. Regardless of whether gpg reported a valid, invalid, or missing signature, the handler unconditionally wrote sign: { success: true, comment: "Good signature" } to the article's security preferences. Impact Any sender could tamper with the body of a multipart/signed PGP email, or craft a message with an entirely fabricated or mismatched signature, and Zammad would display it to the recipient as cryptographically verified with a "Good signature" label. Users and agents relying on Zammad's signature indicator to confirm message authenticity and integrity would be misled into trusting modified or forged content. The vulnerability affects all inbound PGP-signed emails processed while the PGP integration is enabled. This issue is fixed in version 7.0.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 17:41 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/4a9dd5f8a… | x_refsource_MISC |
| https://github.com/zammad/zammad/releases/tag/7.0.2 | x_refsource_MISC |
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No mitigation information available for this CWE.
CAPEC-463: Padding Oracle Crypto Attack
An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.