{"action":"Upgrade soupsieve to 2.9.0 or later.","affected":[{"fixed":"2.9.0","introduced":"0"}],"component":"soupsieve","cve_ids":["CVE-2026-85999"],"ecosystem":"PyPI","epss":0.00609,"exploited":false,"fixed_versions":["2.9.0"],"ghsa_id":"GHSA-j934-xhv5-fg8f","id":"tcs_01M5KHACGPB3YRGS0P5DMBRZJK","modified_at":"2026-10-01T17:45:16.845996024Z","published_at":"2026-10-01T16:38:33.150066Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4171","https://github.com/facelessuser/soupsieve/security/advisories/GHSA-j934-xhv5-fg8f","https://nvd.nist.gov/vuln/detail/CVE-2026-85999","https://github.com/facelessuser/soupsieve/commit/cf198fcddc9230f06ed39f974eba0ce076b85cda","https://github.com/facelessuser/soupsieve","https://github.com/facelessuser/soupsieve/releases/tag/2.9","https://pypi.org/project/soupsieve","https://github.com/advisories/GHSA-j934-xhv5-fg8f"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-4171","url":"https://osv.dev/vulnerability/PYSEC-2026-4171"}],"summary":"Soup Sieve: Polynomial-time ReDoS (O(n²)) in the whitespace/comment trimming regex `RE_WS_END` (triggers on VALID selectors)"}