Allocation of Resources Without Limits or Throttling

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the extractsegment and extractheader processes. An unauthenticated attacker can exhaust system resources and...

Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Summary Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes. During verification, Authlib decodes and parses the full input before it is rejected, driving...

CVE-2025-61920

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

DEBIAN-CVE-2025-61920

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

UBUNTU-CVE-2025-61920

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-61920 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

EUVD-2025-33768

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-61920

CVE-2025-61920 — Authlib (Python) Authlib’s JOSE implementation (prior to v1.6.5) accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url header or signature spans hundreds of megabytes. During verification, the library decodes and parses the f...

CVE-2025-61920

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-61920 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-61920 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-61920

creationtimestamp| type| source ---|---|--- 2025-10-10 02:28:44+00:00| published-proof-of-concept| https://github.com/authlib/authlib/security/advisories/GHSA-pq5p-34cr-23v9...

CVE-2025-61920: Improper Input Validation

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

PT-2025-43412

Name of the Vulnerable Software and Affected Versions Authlib versions prior to 1.6.5 Description Authlib’s JWE implementation, specifically when handling the zip=DEF option, is susceptible to a denial of service. A small ciphertext can expand to a very large plaintext during decompression due to...

Authlib 安全漏洞

Authlib is the ultimate Python library for building OAuth and OpenID Connect servers open-sourced by Authlib. A security vulnerability exists in Authlib versions prior to 1.6.5 that stems from the JOSE implementation accepting unlimited JWS/JWT headers and signature segments, which could lead to ...

EUVD-2021-15057

Malware in sbrugna...

EUVD-2008-2375

Malware in sbrugna...

EUVD-2021-30682

Malicious code in bioql PyPI...

EUVD-2025-30790

Malicious code in bioql PyPI...

PT-2025-41596

Name of the Vulnerable Software and Affected Versions Authlib versions prior to 1.6.5 Description Authlib, a Python library for building OAuth and OpenID Connect servers, has an issue in its JOSE implementation. It accepts JWS/JWT header and signature segments without size limits. An attacker can...