CVE-2025-61920

Katalog CVE

CVSS 7.5 · High EPSS 0,64%

Kerentanan Improper Input Validation pada authlib. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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. During verification, Authlib decodes and parses the full input before it is rejected, driving CPU and memory consumption to hostile levels and enabling denial of service. Version 1.6.5 patches the issue. Some temporary workarounds are available. Enforce input size limits before handing tokens to Authlib and/or use application-level throttling to reduce amplification risk.

Rincian

Terbit di NVD

10 Oktober 2025

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation
CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling

EPSS (30 hari)

0,64% peluang dieksploitasi; lebih tinggi dari 49,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/authlib/authlib/security/advisories/GHSA-pq5p-34cr-23v9 exploit · mitigasi · advisory vendor
• https://github.com/authlib/authlib/commit/867e3f87b072347a1ae9cf6983cc8bbf88447e5e patch
• https://lists.debian.org/debian-lts-announce/2025/10/msg00032.html