{"action":"Upgrade soupsieve to 2.9.0 or later.","affected":[{"fixed":"2.9.0","introduced":"0"}],"component":"soupsieve","cve_ids":["CVE-2026-86000"],"ecosystem":"PyPI","epss":0.00609,"exploited":false,"fixed_versions":["2.9.0"],"ghsa_id":"GHSA-gjv8-xp57-g29c","id":"tcs_01M5KHABXMTMKH2CGJSRC6CKD0","modified_at":"2026-10-01T17:45:17.856132762Z","published_at":"2026-10-01T16:38:33.233778Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4170","https://github.com/facelessuser/soupsieve/security/advisories/GHSA-gjv8-xp57-g29c","https://nvd.nist.gov/vuln/detail/CVE-2026-86000","https://github.com/facelessuser/soupsieve/commit/ce44e4996e6632871c18cdd7a7fb641be8ef34ef","https://github.com/facelessuser/soupsieve","https://github.com/facelessuser/soupsieve/releases/tag/2.9","https://pypi.org/project/soupsieve","https://github.com/advisories/GHSA-gjv8-xp57-g29c"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-4170","url":"https://osv.dev/vulnerability/PYSEC-2026-4170"}],"summary":"Soup Sieve: Polynomial-time ReDoS (O(n²)) in the `IDENTIFIER` / `VALUE` selector sub-patterns"}