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...

kit-jwt

kit-jwt JSON Web Token JWT encoding and decoding for Kit TOC Files File| Description ---|--- .editorconfig| Editor formatting configuration .gitignore| Git ignore rules for build artifacts and dependencies .tool-versions| asdf tool versions Zig, Kit LICENSE| MIT license file README.md| This file...

jwt_tool

The JSON Web Token Toolkit v2 jwttool.py is a toolkit for validating, forging, scanning and tampering JWTs JSON Web Tokens. Its functionality includes: Checking the validity of a token Testing for known exploits: CVE-2015-2951 The alg=none signature-bypass vulnerability CVE-2016-10555 The RS/HS25...

RS256-2-HS256

RS256-2-HS256 JWT Attack to change the algorithm RS256 to HS256 Usage usage: RS2562HS256JWT.py -h payload pubkey positional arguments: payload JSON payload from JWT to attack pubkey Public key file to use for signing optional arguments: -h, --help show this help message and exit Example...

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...

jwt-key-id-injector

JWT Key ID Injector Simple python script to check against hypothetical JWT vulnerability. Let's say there is an application that uses JWT tokens signed HS256 algorithm. An example token looks like the follow:...

CVE-2026-89026

CVE-2026-89026 --- Issabel PBXAPI Exploit & Scanner About CVE-2026-89026 is the security issue targeted by this project. This repository contains a PoC exploit and scanner for researching and validating the affected Issabel PBXAPI authentication behavior. The project is designed for authorized...

CVE-2021-44910_SpringBlade

CVE-2021-44910-SpringBlade Vulnerability Detection Tool SpringBlade JWT authentication vulnerability. Usage python3 Tested with HS256, HS384, and HS512 algorithms respectively...

jwt-key-confusion-poc

JWT Key Confusion PoC CVE-2015-9235 Written for the Hack the Box challenges - Under Construction and Secret Both included scripts perform a Java Web Token Key Confusion Attack CVE-2015-9235. To perform the attack it is required that the attacker know the public key which the server will use to...

cve-2026-102268-poc

CVE-2026-102268 — PyJWT Asymmetric-PEM Detection Bypass Exploitability analysis result: the root cause is confirmed and end-to-end exploitation is reproducible. A whitespace-mutated PEM public key bypasses PyJWT's ispemformat guard and is accepted as a valid HMAC secret, enabling full 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 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 ...

CVE-2026-75431_PowerJob_jwt_key_predictable

PowerJob JWT Signing Key Predictable Key Derived from Default JDBC URL → Token Forgery 1. Summary The PowerJob Server's JWT HS256 signing key is derived by BASE64-decoding a hardcoded constant concatenated with the MD5 of the default JDBC URL DefaultSecretProvider / JwtServiceImpl. The JDBC URL i...

CVE-2026-82329-poc

CVE-2026-82329 Artifactory Security Assessment Tool PoC dan alat validasi untuk mengidentifikasi instalasi JFrog Artifactory self-hosted yang terdampak CVE-2026-82329. Alat ini memvalidasi rantai autentikasi berikut: 1. Membuat join JWT HS256 menggunakan signing key default yang kosong. 2. Mengir...

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:...

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...