Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-jj8c-mmj3-mmgv

Authlib: Cross-site request forging when using cache

CVSS 5.4 MediumEPSS 0.0011 · 1st percentile

Published by the GitHub Advisory Database at 16 Apr 2026, 22:38 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
authlibPyPI<1.6.111.6.11
Identifiers
GHSA-jj8c-mmj3-mmgv · CVE-2026-41425 · PYSEC-2026-25
Weakness (CWE)
CWE-352
Tags
Published
16 Apr 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Authlib versions before 1.6.11 are vulnerable to cross-site request forgery when the OAuth client is configured with a cache to store authorization state. The cache-based flow does not tie the callback to the client that started the login, so an attacker can start an authorization flow, send the resulting callback URL to a victim, and get the victim to complete it, linking the attacker's account to the victim's. Upgrade to Authlib 1.6.11 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0011, the 1st percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 24 Apr 2026, 20:16 UTC Confirmed by NVD
  2. 31 Oct 2026, 14:11 UTC First seen by agentprime
  3. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.