{"action":"Upgrade joserfc to 1.6.8 or later.","affected":[{"fixed":"1.6.8","introduced":"0"}],"component":"joserfc","cve_ids":["CVE-2026-49852"],"ecosystem":"PyPI","epss":0.00171,"exploited":false,"fixed_versions":["1.6.8"],"ghsa_id":"GHSA-gg9x-qcx2-xmrh","id":"tcs_01M5KH00QP7AWGRKDN29FB8A5E","modified_at":"2026-07-13T16:31:58.665037685Z","published_at":"2026-07-13T15:46:27.346994Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2528","https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh","https://github.com/authlib/joserfc/commit/86d00910b2b2d2d07503fee9b572906daefab7f1","https://github.com/authlib/joserfc","https://github.com/authlib/joserfc/blob/1ddca8f3c73ff47e3bc3ac06cb0c08a9535677ec/src/joserfc/_rfc7518/jws_algs.py#L62-L70","https://pypi.org/project/joserfc","https://github.com/advisories/GHSA-gg9x-qcx2-xmrh","https://nvd.nist.gov/vuln/detail/CVE-2026-49852"],"severity":{"label":"high","score":8.7},"sources":[{"source":"osv","source_id":"PYSEC-2026-2528","url":"https://osv.dev/vulnerability/PYSEC-2026-2528"},{"source":"nvd","source_id":"CVE-2026-49852","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49852"}],"summary":"joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)"}