CVE-2026-111642 FastapiAdmin through 3.0 Hard-Coded JWT Secret Privilege Escalation

FastapiAdmin through 3.0 contains a hard-coded JWT signing secret in backend/app/config/setting.py that allows low-privileged users to forge tokens impersonating the superuser. Attackers can register via the unauthenticated /api/v1/system/user/register endpoint, log in, and forge an HS256 token...

CVE-2026-111642 FastapiAdmin through 3.0 Hard-Coded JWT Secret Privilege Escalation

FastapiAdmin through 3.0 contains a hard-coded JWT signing secret in backend/app/config/setting.py that allows low-privileged users to forge tokens impersonating the superuser. Attackers can register via the unauthenticated /api/v1/system/user/register endpoint, log in, and forge an HS256 token...

CVE-2026-111642

Versions of FastapiAdmin through 3.0 are vulnerable to a privilege escalation flaw due to a hard-coded JWT signing secret located in backend/app/config/setting.py. A low-privileged attacker can register via the unauthenticated /api/v1/system/user/register endpoint, log in, and subsequently forge ...

python-jose algorithm confusion guard bypassed by DER-encoded public keys

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 restricte...

PYSEC-2026-4298 python-jose algorithm confusion guard bypassed by DER-encoded public keys

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 restricte...

CVE-2026-53709 MCP Context Forge: Hardcoded default JWT_SECRET_KEY shipped in source and .env.example enables pre-authentication platform admin token forgery

MCP Context Forge is an MCP gateway and administrative platform. Prior to 1.0.2, mcpgateway/config.py and .env.example ship a known JWTSECRETKEY, while verifyjwttoken accepts HS256 tokens signed with that key and getcurrentuser creates a platform administrator when the token subject matches...

jwt-key-id-injector

Inyector de ID de Clave JWT Script simple de Python para verificar una vulnerabilidad hipotética de JWT. Supongamos que hay una aplicación que utiliza tokens JWT firmados con el algoritmo HS256. Un token de ejemplo se ve así:...

NPM: fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusion

NPM: fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusion vulnerability discovered by ? in WordPress Npm fast-jwt versions = 6.2.0, = 6.2.4...

GHSA-WW5H-9M49-7XX4 fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusion

Summary The fix for CVE-2026-34950 CVSS 9.1, released in v6.2.0 is incomplete. It adds key.trim to the PEM-detection path in src/crypto.js, but String.prototype.trim only strips characters classified as whitespace by the ECMAScript specification. The subsequent ^-anchored regex /^-----BEGIN?: RSA...

fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusion

Summary The fix for CVE-2026-34950 CVSS 9.1, released in v6.2.0 is incomplete. It adds key.trim to the PEM-detection path in src/crypto.js, but String.prototype.trim only strips characters classified as whitespace by the ECMAScript specification. The subsequent ^-anchored regex /^-----BEGIN?: RSA...

Improper Verification of Cryptographic Signature

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the key-type detection logic in src/crypto.js, where a non-whitespace prefix control characters, zero-width Unicode, comments, HTTP/PG...

NPM: fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

NPM: fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery vulnerability discovered by ? in WordPress Npm fast-jwt versions 6.2.4...

fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

Summary fast-jwt 6.2.4 silently classifies raw serialized public JWK JSON as an HMAC secret. If an application supplies public JWK JSON text as the verifier key and HS256 is explicitly allowed or automatically inferred, an attacker who knows the same public JSON text can use it as an HMAC key and...

GHSA-G3JJ-5CMM-3HXX fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

Summary fast-jwt 6.2.4 silently classifies raw serialized public JWK JSON as an HMAC secret. If an application supplies public JWK JSON text as the verifier key and HS256 is explicitly allowed or automatically inferred, an attacker who knows the same public JSON text can use it as an HMAC key and...

Improper Verification of Cryptographic Signature

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via performDetectPublicKeyAlgorithms and performDetectPrivateKeyAlgorithm in src/crypto.js, when a serialized asymmetric JWK or JWKS is...

CVE-2026-107724 fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

fast-jwt provides fast JSON Web Token JWT implementation. In 6.2.4, fast-jwt can classify raw serialized public JWK or JWKS JSON as an HMAC secret because src/crypto.js performDetectPublicKeyAlgorithms treats non-PEM strings as symmetric key material. If HS256 is explicitly allowed or inferred, a...

CVE-2026-107724 fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

fast-jwt provides fast JSON Web Token JWT implementation. In 6.2.4, fast-jwt can classify raw serialized public JWK or JWKS JSON as an HMAC secret because src/crypto.js performDetectPublicKeyAlgorithms treats non-PEM strings as symmetric key material. If HS256 is explicitly allowed or inferred, a...

EUVD-2026-95312

fast-jwt provides fast JSON Web Token JWT implementation. In 6.2.4, fast-jwt can classify raw serialized public JWK or JWKS JSON as an HMAC secret because src/crypto.js performDetectPublicKeyAlgorithms treats non-PEM strings as symmetric key material. If HS256 is explicitly allowed or inferred, a...

CVE-2026-107724 fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

fast-jwt provides fast JSON Web Token JWT implementation. In 6.2.4, fast-jwt can classify raw serialized public JWK or JWKS JSON as an HMAC secret because src/crypto.js performDetectPublicKeyAlgorithms treats non-PEM strings as symmetric key material. If HS256 is explicitly allowed or inferred, a...

CVE-2026-107724

The fast-jwt library (version 6.2.4 ) contains a vulnerability where raw serialized public JWK or JWKS JSON can be incorrectly classified as an HMAC secret . The root cause is located in src/crypto.js within the performDetectPublicKeyAlgorithms function, which treats non-PEM strings as symmetric ...