{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"2.11.0","last_affected":"2.13.0"}],"component":"pyjwt","cve_ids":["CVE-2026-103001"],"ecosystem":"PyPI","epss":0.00257,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-gvp8-978c-rx2q","id":"tcs_01M5KHA6WG766JH22SPH5EX4PW","modified_at":"2026-10-01T17:45:16.841846797Z","published_at":"2026-10-01T16:38:41.559119Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4146","https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q","https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35","https://github.com/jpadilla/pyjwt","https://pypi.org/project/pyjwt","https://github.com/advisories/GHSA-gvp8-978c-rx2q","https://nvd.nist.gov/vuln/detail/CVE-2026-103001"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-4146","url":"https://osv.dev/vulnerability/PYSEC-2026-4146"}],"summary":"PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse"}