Detections
Analytics

SCA: security update for authlib (GHSA-pq5p-34cr-23v9)

high Tenable Self-Hosted Container Security Plugin ID 435582

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2025-61920)

See Also

https://github.com/advisories/GHSA-pq5p-34cr-23v9

Plugin Details

Severity: High

ID: 435582

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 10/11/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.89

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2025-61920

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/10/2025

Vulnerability Publication Date: 10/10/2025

Reference Information

CVE: CVE-2025-61920