OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client
High-risk advisory
CVE-2026-118669
Summary
OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client
Why it matters
GitHub has published a reviewed security advisory for oauthlib. Prioritize it with other application dependency updates, especially because EPSS places it in the 24% percentile.
Operator check
Check whether oauthlib is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.4. EPSS probability: 0.3%; percentile: 24%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.