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Advisory record · GHSA-7984-qgvg-3j9c

OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client

CVSS 8.4 HighEPSS 0.0031 · 24th percentile

Published by the GitHub Advisory Database at 30 Oct 2026, 22:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
oauthlibPyPI<4.0.04.0.0
Identifiers
GHSA-7984-qgvg-3j9c · CVE-2026-118669
Weakness (CWE)
CWE-863
Tags
Published
30 Oct 2026
Updated
30 Oct 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
8.4 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0031, the 24th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 28 Oct 2026, 21:09 UTC Confirmed by the CVE List
  2. 28 Oct 2026, 22:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:07 UTC First seen by agentprime
  4. 31 Oct 2026, 14:07 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.