POC-CVE-2018-0114

CVE-2018-0114 POC Una vulnerabilidad en la librería de código abierto node-jose de Cisco, anterior a la versión 0.11.0, podría permitir a un atacante remoto no autenticado volver a firmar tokens utilizando una clave incrustada dentro del propio token. La vulnerabilidad se debe a que node-jose sig...

CVE-2018-0114

CVE-2018-0114 Explotación de una vulnerabilidad en node-jose de Cisco, una biblioteca JavaScript creada para gestionar JWT. Esta vulnerabilidad en node-jose de Cisco permite a un atacante falsificar tokens maliciosos. JWT permite a los usuarios incrustar claves públicas usando el valor jwk dentro...

jwt-spoof-tool

jwt-spoof-tool Descripción de la herramienta: Creé esta herramienta con fines educativos y para automatizar el secuestro de tokens JWT sin depender del uso de BurpSuite. El código está bien documentado y es fácil de seguir. Basado en CVE-2018-0114. La vulnerabilidad ocurre porque en el backend, e...

CVE-2018-0114-PoC

CVE-2018-0114 PoC Wrote this for PentesterLab If you are from PentesterLab's don't cheat, it's alot better to learn. Hope it's useful to someone, if not to me in the future : Example root@kitploit: $ python3 script.py Making keys... 'alg': 'RS256', 'jwk': 'kty': 'RSA', 'kid':...

Linux Distros Unpatched Vulnerability : CVE-2026-54431

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4...

AZL-91682 CVE-2026-54431 affecting package liboauth 1.0.3-15

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431 Improper Data Validation in liboauth2

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431 Improper Data Validation in liboauth2

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

Security update for python-PyJWT

This update for python-PyJWT fixes the following issues CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are called...

Important: python-jwt

Issue Overview: PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer publi...

SUSE-SU-2026:22238-1 Security update for python-PyJWT

This update for python-PyJWT fixes the following issues - CVE-2026-48522: PyJWKClient passes URI arguments directly to urllib.request.urlopen and allows for SSRF and token forgery bsc1266798. - CVE-2026-48523: verifier-side algorithm allow-list bypass when jwt.decode or jwt.decodecomplete are...

EUVD-2026-32915

PyJWKClient: missing scheme allowlist enables CVE-2024-21643-class SSRF + token forgery via file://, ftp://, data: schemes...

python-pyjwt: PyJWT: Authentication bypass due to forged JSON Web Tokens

A flaw was found in PyJWT, a Python library for JSON Web Token JWT implementation. When decoding JWTs, the library fails to validate the use of JSON Web Keys JWK in the HMAC algorithm while also supporting asymmetric algorithms. This allows a remote attacker to use the issuer's public key as the...

SUSE CVE-2026-48522

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient passes its uri argument directly to urllib.request.urlopen which uses Python stdlib's default OpenerDirector registering HTTPHandler, HTTPSHandler, FTPHandler, FileHandler, and DataHandler. There is currently no...

SUSE CVE-2026-48526

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the jwt.decode or jwt.decodecomplete functions when used with a PyJWK key. An attacker can bypass algorithm restrictions and gain unauthorized access to protected resources by signing...

DEBIAN-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...

PYSEC-0000-CVE-2026-48526

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the...