CVE-2026-29000

JWT/JWE Authentication Bypass PoC A Proof-of-Concept PoC script demonstrating an authentication bypass vulnerability using JSON Web Tokens JWT and JSON Web Encryption JWE. This tool exploits environments that improperly validate token algorithms by accepting unverified JWTs alg: none wrapped insi...

PyJWT: HS256/384/512 verify accepts empty HMAC key via oct JWK (PyJWK/PyJWKClient) enabling token forgery

Summary HMACAlgorithm.fromjwk accepts a symmetric kty=oct JWK whose k value is the empty string and returns a zero-length key without raising. When a token is then verified with that key object a PyJWK, or a PyJWK resolved by PyJWKSet / PyJWKClient, the HMAC verifier computes HMACkey=b"",...

GHSA-PXH4-856F-4H89 PyJWT: HS256/384/512 verify accepts empty HMAC key via oct JWK (PyJWK/PyJWKClient) enabling token forgery

Summary HMACAlgorithm.fromjwk accepts a symmetric kty=oct JWK whose k value is the empty string and returns a zero-length key without raising. When a token is then verified with that key object a PyJWK, or a PyJWK resolved by PyJWKSet / PyJWKClient, the HMAC verifier computes HMACkey=b"",...

poc-cve-2016-10555

Change the algorithm RS256asymmetric to HS256symmetric - POC CVE-2016-10555 The algorithm HS256 uses the secret key to sign and verify each message. The algorithm RS256 uses the private key to sign the message and uses the public key for authentication. If you change the algorithm from RS256 to...

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...

oauth2-proxy

OAuth2 Proxy is a flexible, open-source tool that can act as either a standalone reverse proxy or a middleware component integrated into existing reverse proxy or load balancer setups. It provides a simple and secure way to protect your web applications with OAuth2 / OIDC authentication. As a...

CVE-2026-48558

CVE-2026-48558: SimpleHelp OIDC Authentication Bypass !WARNING This code is provided AS IS for educational and research purposes only. Do not use this PoC on production systems, shared environments, or any unauthorized targets. This exploit demonstrates a critical remote code execution RCE...

CVE-2026-4444-JWT-Algorithm-Confusion-via-kid-Injection

CVE-2026-4444 – JWT Algorithm Confusion via kid Injection Program Code Node.js server + Python exploit // jwtserver.js - Vulnerable JWT verification server const express = require'express'; const jwt = require'jsonwebtoken'; const jwksClient = require'jwks-rsa'; const axios = require'axios'; cons...

cve-2022-39227-jwt-auth-bypass-demo

CVE-2022-39227 JWT Authentication Bypass Demo Project Goal This project demonstrates the CVE-2022-39227 vulnerability in a controlled local lab environment. This vulnerability affects the python-jwt library versions 3.3.4 and allows an attacker to forge JWT claims without knowing the secret key b...

cve-2026-21858

CVE-2026-21858 + CVE-2025-68613 - n8n Full Chain Unauthenticated Arbitrary File Read → Admin Token Forge → Sandbox Bypass → RCE | ---|--- CVE| CVE-2026-21858 AFR + CVE-2025-68613 RCE CVSS| 10.0 + 9.9 Critical Affected| = 0.211.0 RCE Fixed| 1.121.0 AFR / 1.120.4+ RCE Disclosed| 2026-01-07 11:09 UT...

CVE-2025-68860

CVE-2025-68860 WordPress Mobile builder Plugin Authentication Bypass Using an Alternate Path or Channel vulnerability in Mobile Builder allows Authentication Abuse. This issue affects Mobile builder from n/a through 1.4.2. CVSS Score: 9.8 CRITICAL Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H A...

POC_CVE-2015-9235

CVE-2015-9235 Demonstration of the algorithm confusion attack on Json Web Token JWT libraries. JWTs are often used in cookies to certify a user session and so this attack is critical. The node module [email protected] was used to demonstrate the vulnerability. This project was also a nice vi...

CVE-2025-59390-

CVE-2025-59390- The attached POC will allow you to crack the Kerberos signiture in Apache Druid and also, any integer created by ThreadLocalRandom Advisory - Apache Druid’s Kerberos authenticator uses a weak fallback secret when the druid.auth.authenticator.kerberos.cookieSignatureSecret...

CVE-2026-29000-Lab

CVE-2026-29000 — pac4j-jwt Library-Level PoC Lab TL;DR This repository contains a library-level PoC for CVE-2026-29000 in pac4j-jwt. It compares vulnerable and patched behavior with two cases: Baseline : a legitimate token should be accepted Attack : a forged token should be accepted on vulnerabl...

TokenBreaker

TokenBreaker Token Breaker is focused on 2 particular vulnerability related to JWT tokens. None Algorithm RSAtoHMAC Refer to this link about insights of the vulnerability and how an attacker can forge the tokens Try out this vulnerability here TheNone Usage usage: TheNone.py -h -t TOKEN...

2025-Oracle-SSO-LDAP-Attack-Post-Incident-Written-Report

2025-Oracle-SSO-LDAP-Attack-Post-Incident-Written-Report This post-incident report examines the 2025 supply chain breach targeting Oracle Cloud’s identity and authentication infrastructure. It details how threat actors exploited an unpatched pre-authentication Remote Code Execution vulnerability...

CVE-2026-29000

CVE-2026-29000: pac4j-jwt JwtAuthenticator authentication bypass Full buildout: writeup, Java in-process PoC, Python token-forge CLI and library, tests. Summary CVE: CVE-2026-29000 CVSS 10, CWE-347 Affected: pac4j-jwt 4.5.9 / 5.7.9 / 6.3.3 when using JWE + signature config Issue: JWE-wrapped...

pyjwt: pyjwt: Token forgery via improper Unicode byte-order mark handling

A flaw was found in pyjwt. When verifying cryptographic keys, the raw JSON Web Key JWK parser fails to normalize Unicode byte-order marks BOM. In mixed-algorithm verification environments, an attacker who knows the public key can supply a key prefixed with a byte-order mark, causing the system to...

CVE-2026-55040-Mass-Exploit

JWT Token Bypass Exploit for Microsoft SharePoint CVE-2026-55040, CVSS 9.1. Forge authentication tokens using three attack vectors: Algorithm "none" skips signature verification Weak HS256 secrets with brute-force dictionary support RS256 key substitution Impersonate any user including...

cve-2026-29000

CVE-2026-29000 Exploit JWT Authentication Bypass in pac4j-jwt via JWE-wrapped PlainJWT Vulnerability Description CVE-2026-29000 is a critical authentication bypass vulnerability affecting pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3. The vulnerability allows remote attackers to forge...