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.
1320 vulnerabilities reference this CWE, most recent first.
CVE-2026-89169 (GCVE-0-2026-89169)
Vulnerability from cvelistv5 – Published: 2026-09-11 04:44 – Updated: 2026-09-11 15:57
VLAI
EPSS
VEX
Summary
live-boot ff8867c allows attackers to bypass the dm-verity-enforce-roothash-signature protection mechanism when the .verity file is missing.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 15:56 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
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CVE-2026-89086 (GCVE-0-2026-89086)
Vulnerability from cvelistv5 – Published: 2026-09-10 19:52 – Updated: 2026-09-10 21:00
VLAI
EPSS
VEX
Summary
In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 20:40 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
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CVE-2026-89043 (GCVE-0-2026-89043)
Vulnerability from cvelistv5 – Published: 2026-09-10 17:39 – Updated: 2026-09-10 17:53
VLAI
EPSS
VEX
Title
passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending
Summary
passport-saml-encrypted through 0.1.13 contains an XML signature wrapping vulnerability where signature verification and assertion extraction use independent XPath lookups with no cross-validation. Attackers holding any validly signed SAML message can prepend a forged unsigned assertion that gets accepted as the verified identity while the genuine signature validates against the original assertion.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 17:53 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/krakenjs/passport-saml-encrypt… | issue-tracking |
| https://github.com/krakenjs/passport-saml-encrypt… | technical-description |
| https://github.com/krakenjs/passport-saml-encrypt… | technical-description |
| https://github.com/krakenjs/passport-saml-encrypted | product |
| https://www.vulncheck.com/advisories/passport-sam… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| krakenjs | passport-saml-encrypted |
Affected:
0 , ≤ 0.1.13
(semver)
|
Date Public
2026-08-11 00:00
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CVE-2026-89042 (GCVE-0-2026-89042)
Vulnerability from cvelistv5 – Published: 2026-09-10 17:39 – Updated: 2026-09-11 20:32
VLAI
EPSS
VEX
Title
passport-saml-encrypted through 0.1.13 Authentication Bypass via Missing Signature Verification
Summary
passport-saml-encrypted through 0.1.13 makes SAML signature verification conditional on an optional cert option, allowing attackers to bypass authentication by submitting unsigned SAML responses. Attackers can post forged SAML responses with arbitrary NameID and attributes to the assertion consumer service endpoint to receive authenticated profiles without valid signatures.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 17:09 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/krakenjs/passport-saml-encrypt… | issue-tracking |
| https://github.com/krakenjs/passport-saml-encrypt… | technical-description |
| https://github.com/krakenjs/passport-saml-encrypt… | technical-description |
| https://github.com/krakenjs/passport-saml-encrypted | product |
| https://www.vulncheck.com/advisories/passport-sam… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| krakenjs | passport-saml-encrypted |
Affected:
0 , ≤ 0.1.13
(semver)
|
Date Public
2026-08-11 00:00
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CVE-2026-87802 (GCVE-0-2026-87802)
Vulnerability from cvelistv5 – Published: 2026-09-14 10:22 – Updated: 2026-09-14 10:22
VLAI
EPSS
VEX
Title
Apache Syncope: SRA OAuth2 JWT signature verification bypass
Summary
Improper verification of cryptographic signature vulnerability in Apache Syncope.
When SRA is configured for OAuth 2.0 without JWKS set URI assigned, an attacker can forge arbitrary JWTs to impersonate any user identity and permissions, gaining full access to services proxied by SRA.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.7, from 4.1.0-M0 through 4.1.2.
Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.
Severity
No CVSS data available.
CWE
- CWE-347 - Improper verification of cryptographic signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/gx83cootj00kn8hqd… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Syncope |
Affected:
3.0.0-M0 , ≤ 3.0.16
(semver)
Affected: 4.0.0-M0 , ≤ 4.0.7 (semver) Affected: 4.1.0-M0 , ≤ 4.1.2 (semver) |
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CVE-2026-87732 (GCVE-0-2026-87732)
Vulnerability from cvelistv5 – Published: 2026-09-09 04:03 – Updated: 2026-09-09 13:11
VLAI
EPSS
VEX
Summary
An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml. The AES.GCM.authenticate_decrypt_into and Chacha20.authenticate_decrypt_into functions write the decrypted plaintext into a caller-provided buffer and only then compares the tag. On a forged tag, the functions returns false, but the destination buffer already holds the full plaintext.
Severity
6.2 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 13:11 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OCaml | mirage-crypto |
Affected:
0 , < 2.2.0
(semver)
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CVE-2026-86304 (GCVE-0-2026-86304)
Vulnerability from cvelistv5 – Published: 2026-09-06 22:24 – Updated: 2026-09-08 18:41
VLAI
EPSS
VEX
Title
MojoX::Authentication versions before 0.006 for Perl allow SAML authentication bypass because parse_assertion builds Net::SAML2::Binding::POST without a trust anchor
Summary
MojoX::Authentication versions before 0.006 for Perl allow SAML authentication bypass because parse_assertion builds Net::SAML2::Binding::POST without a trust anchor.
parse_assertion in MojoX::Authentication::Model::SAML2 calls Net::SAML2::Binding::POST->new with no cacert, cert_text or anchors argument, then passes the returned XML to Net::SAML2::Protocol::Assertion->new_from_xml with the IdP signing certificate as cacert. In Net::SAML2 before 0.86 that certificate guards only encrypted assertions, so the signature on an unencrypted assertion is checked against the certificate the response itself carries.
An attacker starts a SAML login, then posts a response signed with a certificate of their own. The audience, InResponseTo and timestamp checks that follow are all satisfiable by the attacker, so the response authenticates any NameID it carries.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:41 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
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CVE-2026-86080 (GCVE-0-2026-86080)
Vulnerability from cvelistv5 – Published: 2026-09-08 21:25 – Updated: 2026-09-09 13:16
VLAI
EPSS
VEX
Title
n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open
Summary
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the GitHub Trigger generated a webhook secret but discarded it when GitHub returned HTTP 422 and the node reused an existing webhook. Workflow static data then retained webhookId without webhookSecret, and X-Hub-Signature-256 verification accepted deliveries without a stored secret. The affected logic includes packages/nodes-base/nodes/Github/GithubTriggerHelpers.ts and the 422 webhook reuse path. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 13:16 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
| https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76 | x_refsource_MISC |
| https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 | x_refsource_MISC |
| https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 | x_refsource_MISC |
Impacted products
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CVE-2026-85525 (GCVE-0-2026-85525)
Vulnerability from cvelistv5 – Published: 2026-09-04 08:22 – Updated: 2026-09-10 15:44
VLAI
EPSS
VEX
Title
Improper OCSP response validation in Snowflake drivers
Summary
Improper OCSP response validation in the Snowflake Python, Go, JDBC, and Node.js drivers allowed a revoked TLS certificate to be accepted as valid, because OCSP responses were not reliably bound to the certificate being validated and definitive verification failures were treated as transient. A man-in-the-middle attacker holding a revoked certificate and its private key for a Snowflake or stage hostname could cause the driver to establish a TLS session to the attacker-controlled endpoint anyway, allowing the attacker to read and modify data transmitted within that connection. Successful exploitation requires that on-path position and the corresponding private key, and impact is limited to data carried within the intercepted connection. The fix is available in Snowflake Connector for Python v4.7.3, Snowflake Go Driver v2.2.0, Snowflake JDBC Driver v4.3.4 (including the snowflake-jdbc-fips and snowflake-jdbc-thin), and Snowflake Node.js Driver v3.3.0. Users must manually upgrade.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 19:40 UTC
CWE
Assigner
References
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Snowflake | Snowflake Connector for Python |
Affected:
0 , < 4.7.3
(python)
|
|
| Snowflake | Snowflake Go Driver |
Affected:
0 , ≤ 1.19.1
(semver)
|
|
| Snowflake | Snowflake Go Driver |
Affected:
2.0.0 , < 2.2.0
(semver)
|
|
| Snowflake | Snowflake JDBC Driver |
Affected:
0 , < 4.3.4
(maven)
|
|
| Snowflake | Snowflake JDBC Driver (FIPS) |
Affected:
0 , < 4.3.4
(maven)
|
|
| Snowflake | Snowflake JDBC Driver (Thin) |
Affected:
0 , < 4.3.4
(maven)
|
|
| Snowflake | Snowflake Node.js Driver |
Affected:
0 , < 3.3.0
(semver)
|
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CVE-2026-85394 (GCVE-0-2026-85394)
Vulnerability from cvelistv5 – Published: 2026-09-03 18:54 – Updated: 2026-09-14 13:50
VLAI
EPSS
VEX
Title
python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret
Summary
python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 13:05 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/mpdavis/python-jose/issues/414 | issue-tracking |
| https://github.com/mpdavis/python-jose | product |
| https://github.com/mpdavis/python-jose/blob/018b3… | technical-description |
| https://github.com/mpdavis/python-jose/blob/018b3… | technical-description |
| https://github.com/advisories/GHSA-6c5p-j8vq-pqhj | related |
| https://www.vulncheck.com/advisories/python-jose-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mpdavis | python-jose |
Affected:
0 , ≤ 3.5.0
(semver)
cpe:2.3:a:python-jose_project:python-jose:*:*:*:*:*:*:*:* |
Date Public
2026-07-06 00:00
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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.