CVE-2026-33265

The vulnerability CVE-2026-33265 affects LibreChat 0.8.1-rc2, where a logged-in user can obtain a JWT for both the LibreChat API and the RAG API. The connected documents confirm the affected product and the exact outcome (JWTs issued to an authenticated user), but they do not provide root cause d...

CVE-2026-33265

In LibreChat 0.8.1-rc2, a logged-in user obtains a JWT for both the LibreChat API and the RAG API...

CVE-2026-33265

In LibreChat 0.8.1-rc2, a logged-in user obtains a JWT for both the LibreChat API and the RAG API...

CVE-2025-41258

LibreChat version 0.8.1-rc2 uses the same JWT secret for the user session mechanism and RAG API which compromises the service-level authentication of the RAG API...

CVE-2025-41258 LibreChat RAG API Authentication Bypass

LibreChat version 0.8.1-rc2 uses the same JWT secret for the user session mechanism and RAG API which compromises the service-level authentication of the RAG API...

PT-2026-26053

🟠 CVE-2025-41258 - High LibreChat version 0.8.1-rc2 uses the same JWT secret for the user session mechanism and RAG API which compromises the service-level authentication of the RAG API. https://t.co/MJXOI2sVrJ https://t.co/WsKiIkw0M2...

LibreChat 安全漏洞

LibreChat is an open-source, free, and highly customizable unified AI dialogue platform. It allows for the aggregation and running of large models from any vendor within one interface. Version 0.8.1-rc2 of LibreChat contains a security vulnerability. This vulnerability stems from the use of the...

PT-2026-26054

CVE-2026-33265 In LibreChat 0.8.1-rc2, a logged-in user obtains a JWT for both the LibreChat API and the RAG API. https://t.co/i9mMVjDhcg...

SUSE CVE-2026-27962

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passed to any...

Improper Verification of Cryptographic Signature

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the JsonWebSignature.preparealgorithmkey method in authlib/jose/rfc7515/jws.py. An attacker can bypass authenticatio...

GHSA-WVWJ-CVRP-7PV5 Authlib JWS JWK Header Injection: Signature Verification Bypass

Description Summary A JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passed to any JWS deserialization function, the library extracts and uses the cryptographic...

FastMCP OAuth Proxy token reuse across MCP servers

While testing the OAuth Proxy implementation, it was noticed that the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the token explicitly for this MCP server, the token is issued for the baseurl passed to...

Authlib 数据伪造问题漏洞

Authlib is an open-source library developed by Authlib, designed to build servers for OAuth and OpenID Connect. Versions of Authlib prior to 1.6.9 contained a data manipulation vulnerability, caused by header injection in the JWS implementation. This vulnerability could allow unauthenticated...

Centrifugo's InsecureSkipTokenSignatureVerify flag silently disables JWT verification with no warning

Summary Centrifugo supports a configuration flag insecureskiptokensignatureverify that completely disables JWT signature verification. When enabled, Centrifugo accepts any JWT token regardless of signature validity — including tokens signed with wrong keys, random signatures, or no signature at...

EUVD-2026-11728

PyJWT accepts unknown crit header extensions...

PyJWT accepts unknown `crit` header extensions

Summary PyJWT does not validate the crit Critical Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This is t...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...

PYSEC-2026-120

PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit Critical Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting...