Authlib Incomplete Algorithm-confusion Fix Permits HMAC Forgery With Prefixed Public Keys

Summary "OctKey.importkey" carries the only guard that stops an asymmetric public key from being used as an HMAC secret in "authlib.jose". That guard is "rawkey.startswithPOSSIBLEUNSAFEKEYS" — anchored at byte 0 — while the loader that consumes the identical bytes on the asymmetric path...

Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys

Summary OctKey.importkey carries the only guard that stops an asymmetric public key from being used as an HMAC secret in authlib.jose. That guard is rawkey.startswithPOSSIBLEUNSAFEKEYS — anchored at byte 0 — while the loader that consumes the identical bytes on the asymmetric path...

GHSA-7VR2-2FGP-9W7P Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys

Summary OctKey.importkey carries the only guard that stops an asymmetric public key from being used as an HMAC secret in authlib.jose. That guard is rawkey.startswithPOSSIBLEUNSAFEKEYS — anchored at byte 0 — while the loader that consumes the identical bytes on the asymmetric path...

PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse

SummaryPyJWT.decode/decodecomplete mutates a caller-supplied options dict in place whenever verifysignature is falsy, adding verifyexp/verifynbf/verifyiat/verifyaud/verifyiss/verifysub/verifyjti keys directly onto that object. If application code reuses the same options dict across calls a config...

PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

Packagepyjwt PyPI Affected versionstested & verified on: 2.13.0. Every version whose PyJWS.load translates only ValueError is affected DescriptionPyJWS.looad jwt/apijws.py:337 splits the compact token, base64url decodes the header segment and hands it to json.loads before verifysignature runs. Th...

PYSEC-2026-4142 PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

Package pyjwt PyPI Affected versions tested & verified on: 2.13.0. Every version whose PyJWS.load translates only ValueError is affected Description PyJWS.looad jwt/apijws.py:337 splits the compact token, base64url decodes the header segment and hands it to json.loads before verifysignature runs...

PT-2026-105892

Summary PyJWT.decode/decode complete mutates a caller-supplied options dict in place whenever verify signature is falsy, adding verify exp/verify nbf/verify iat/verify aud/verify iss/verify sub/verify jti keys directly onto that object. If application code reuses the same options dict across call...

PT-2026-105889

Summary PyJWKClient.get signing key from jwttoken — the first step of the JWKS verification flow documented in docs/usage.rst — must decode a token's payload before its signature can be checked, via jwt.api jwt.decode completetoken, options="verify signature": False. That call parses the payload...

PT-2026-105515

Summary PyJWT.decode/decode complete mutates a caller-supplied options dict in place whenever verify signature is falsy, adding verify exp/verify nbf/verify iat/verify aud/verify iss/verify sub/verify jti keys directly onto that object. If application code reuses the same options dict across call...

GHSA-8WJV-2P76-3863 PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

Package pyjwt PyPI Affected versions tested & verified on: 2.13.0. Every version whose PyJWS.load translates only ValueError is affected Description PyJWS.looad jwt/apijws.py:337 splits the compact token, base64url decodes the header segment and hands it to json.loads before verifysignature runs...

PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

Package pyjwt PyPI Affected versions tested & verified on: 2.13.0. Every version whose PyJWS.load translates only ValueError is affected Description PyJWS.looad jwt/apijws.py:337 splits the compact token, base64url decodes the header segment and hands it to json.loads before verifysignature runs...

CVE-2026-102265 PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS.load in jwt/apijws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the...

CVE-2026-102265 PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS.load in jwt/apijws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the...

CVE-2026-102265 PyJWT: Uncaught RecursionError in jwt.decode() on deeply nested token header

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS.load in jwt/apijws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the...

CVE-2026-102265

The PyJWT Python library (versions 2.13.0 through 2.13.x ) is vulnerable due to a missing exception handler in the PyJWS._load function within jwt/api_jws.py. The parser currently catches ValueError but fails to catch RecursionError, which can be triggered when processing a deeply nested token he...

[SECURITY] [DLA 4787-1] ruby-jwt security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-4787-1 [email protected] https://www.debian.org/lts/security/ Abhijith PA September 18, 2026 https://wiki.debian.org/LTS -...

CVE-2026-46684

DataEase is an open source data visualization and analysis tool. Prior to 2.10.23, DataEase enterprise token handling can let TokenFilterdoFilter pass X-DE-TOKEN values to TokenUtils.validate, which checks only token presence and length before userBOByTokentoken uses JWT.decode without signature...

CVE-2026-46684: Improper Verification of Cryptographic Signature

DataEase is an open source data visualization and analysis tool. Prior to 2.10.23, DataEase enterprise token handling can let TokenFilterdoFilter pass X-DE-TOKEN values to TokenUtils.validate, which checks only token presence and length before userBOByTokentoken uses JWT.decode without signature...

CVE-2026-45363: Improper Authentication

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

CVE-2026-48523

PyJWT is a JSON Web Token implementation in Python. From 2.9.0 to 2.12.1, there is a verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are called with a PyJWK key. The token header alg is checked against the caller-supplied algorithms allow-list, but signature...