{"action":"Upgrade joserfc to 1.6.7 or later.","affected":[{"fixed":"1.6.7","introduced":"1.3.4"}],"component":"joserfc","cve_ids":["CVE-2026-48990"],"ecosystem":"PyPI","epss":0.00163,"exploited":false,"fixed_versions":["1.6.7"],"ghsa_id":"GHSA-wphv-vfrh-23q5","id":"tcs_01M5KG2KJ3DSGEVJXW04ABM67A","modified_at":"2026-09-10T03:50:50.864205034Z","published_at":"2026-06-26T20:59:38Z","references":["https://osv.dev/vulnerability/GHSA-wphv-vfrh-23q5","https://github.com/authlib/joserfc/security/advisories/GHSA-wphv-vfrh-23q5","https://nvd.nist.gov/vuln/detail/CVE-2026-48990","https://github.com/authlib/joserfc","https://github.com/authlib/joserfc/releases/tag/1.6.7"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-wphv-vfrh-23q5","url":"https://osv.dev/vulnerability/GHSA-wphv-vfrh-23q5"}],"summary":"joserfc: b64=false RFC7797 JWS payloads bypass JWSRegistry payload-size limits during deserialization"}