jwt-spoof-tool

jwt-spoof-tool Tool Description : I made this tool for learning purpose and automating jwt token hijacking without depending on using burpsuite the code is well documented and easy to follow Based on CVE-2018-0114 The Vulnerabilty happend because in backend the server check jwk object embeded...

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 $ python3 script.py Making keys... 'alg': 'RS256', 'jwk': 'kty': 'RSA', 'kid': '[email protected]', 'use':...

CVE-2018-0114

CVE-2018-0114 Exploitation of a vulnerability in Cisco's node-jose, a JavaScript library created to manage JWT. This vulnerability in Cisco's node-jose allows an attacker to forge malicious tokens. JWT allows users to embed public keys using the jwk value inside the header of the token. However,...

POC-CVE-2018-0114

CVE-2018-0114 POC A vulnerability in the Cisco node-jose open source library before 0.11.0 could allow an unauthenticated, remote attacker to re-sign tokens using a key that is embedded within the token. The vulnerability is due to node-jose following the JSON Web Signature JWS standard for JSON...

USN-8916-2: PyJWT vulnerabilities

USN-8916-1 fixed vulnerabilities in PyJWT. This update provides the corresponding fix for PyJWT on Ubuntu 26.10. Original advisory details: YuSung Han discovered that PyJWT did not properly validate certain JWK keys when performing HMAC verification. An attacker could possibly use this issue to...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : PyJWT vulnerabilities (USN-8916-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8916-1 advisory. YuSung Han discovered that PyJWT did not properly validate certain JWK keys when performing HMAC...

USN-8916-1: PyJWT vulnerabilities

YuSung Han discovered that PyJWT did not properly validate certain JWK keys when performing HMAC verification. An attacker could possibly use this issue to forge authentication tokens. This issue only affected Ubuntu 26.04 LTS. CVE-2026-102266 Rohan Das discovered that PyJWT incorrectly handled...

USN-8916-1 pyjwt vulnerabilities

YuSung Han discovered that PyJWT did not properly validate certain JWK keys when performing HMAC verification. An attacker could possibly use this issue to forge authentication tokens. This issue only affected Ubuntu 26.04 LTS. CVE-2026-102266 Rohan Das discovered that PyJWT incorrectly handled...

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...

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...

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 ...

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...

PT-2026-108253

Name of the Vulnerable Software and Affected Versions fast-jwt version 6.2.4 Description An issue exists where raw serialized public JSON Web Key JWK or JSON Web Key Set JWKS JSON is incorrectly classified as an HMAC secret. This occurs because the performDetectPublicKeyAlgorithms function in...

GHSA-X33G-CR3X-6449 PyJWT accepts inconsistent OKP x/d JWKs, causing public/private key identity confusion

Summary PyJWT accepts internally inconsistent OKP private JWKs where the declared public key x does not correspond to the supplied private key d. When d is present, OKPAlgorithm.fromjwk constructs the Ed25519/Ed448 private key from d without verifying that the public key derived from d matches x...

PyJWT accepts inconsistent OKP x/d JWKs, causing public/private key identity confusion

Summary PyJWT accepts internally inconsistent OKP private JWKs where the declared public key x does not correspond to the supplied private key d. When d is present, OKPAlgorithm.fromjwk constructs the Ed25519/Ed448 private key from d without verifying that the public key derived from d matches x...

PYSEC-2026-4151 PyJWT accepts public JWK containers as HMAC secrets

Summary PyJWT 2.13.0 contains an incomplete defense against algorithm confusion when an application mixes symmetric and asymmetric algorithms in one verification path. A public RSA, EC, or OKP JWK can be accepted as an HMAC secret when it is wrapped in a JWKS object, nested in an array, or...

PYSEC-2026-4152 PyJWT: Malformed RSA JWK aborts parsing of an entire JWK Set

Summary A malformed RSA JWK inside a JWK Set aborts parsing of the entire set instead of being skipped, because RSAAlgorithm.fromjwk can raise a plain ValueError that isn't caught by PyJWKSet's per-key error-skipping logic. Affected component / version - Package: PyJWT PyPI, ecosystem pip - Files...

PyJWT: Malformed RSA JWK aborts parsing of an entire JWK Set

SummaryA malformed RSA JWK inside a JWK Set aborts parsing of the entire set instead of being skipped, because RSAAlgorithm.fromjwk can raise a plain ValueError that isn't caught by PyJWKSet's per-key error-skipping logic. Affected component / version- Package: PyJWT PyPI, ecosystem pip- Files:...