{"action":"Upgrade oauthlib to 4.0.0 or later.","affected":[{"fixed":"4.0.0","introduced":"3.0.0"}],"component":"oauthlib","cve_ids":["CVE-2026-49265"],"ecosystem":"PyPI","epss":0.00375,"exploited":false,"fixed_versions":["4.0.0"],"ghsa_id":"GHSA-xpv3-w29h-x7cv","id":"tcs_01M5KHA0BCFJSVDTSHHSB3PX0C","modified_at":"2026-10-01T17:45:10.985894602Z","published_at":"2026-10-01T16:38:40.027560Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4114","https://github.com/oauthlib/oauthlib/security/advisories/GHSA-xpv3-w29h-x7cv","https://github.com/oauthlib/oauthlib/pull/963","https://github.com/oauthlib/oauthlib/commit/40b0ab56da3682c2484a4b78bbff309f8025d950","https://github.com/oauthlib/oauthlib","https://pypi.org/project/oauthlib","https://github.com/advisories/GHSA-xpv3-w29h-x7cv","https://nvd.nist.gov/vuln/detail/CVE-2026-49265"],"severity":{"label":"medium","score":6.8},"sources":[{"source":"osv","source_id":"PYSEC-2026-4114","url":"https://osv.dev/vulnerability/PYSEC-2026-4114"}],"summary":"Oauthlib: Timing Attack Vulnerability in PKCE code_verifier Comparison (CWE-208)"}