{"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_01M5KFHK8F1543MM6BZ2XP4VCR","modified_at":"2026-09-10T03:50:52.107071179Z","published_at":"2026-07-02T19:12:08Z","references":["https://osv.dev/vulnerability/GHSA-gg9x-qcx2-xmrh","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"],"severity":{"label":"high","score":8.7},"sources":[{"source":"osv","source_id":"GHSA-gg9x-qcx2-xmrh","url":"https://osv.dev/vulnerability/GHSA-gg9x-qcx2-xmrh"},{"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)"}