{"action":"Upgrade activesupport to 7.2.3.1 or later.","affected":[{"fixed":"8.1.2.1","introduced":"8.1.0.beta1"},{"fixed":"8.0.4.1","introduced":"8.0.0.beta1"},{"fixed":"7.2.3.1","introduced":"0"}],"component":"activesupport","cve_ids":["CVE-2026-33169"],"ecosystem":"RubyGems","epss":0.00656,"exploited":false,"fixed_versions":["8.1.2.1","8.0.4.1","7.2.3.1"],"ghsa_id":"GHSA-cg4j-q9v8-6v38","id":"tcs_01M5KEJR7G440N1AT85MYA6XBS","modified_at":"2026-09-10T03:50:38.710868605Z","published_at":"2026-03-23T20:52:40Z","references":["https://osv.dev/vulnerability/GHSA-cg4j-q9v8-6v38","https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38","https://nvd.nist.gov/vuln/detail/CVE-2026-33169","https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11","https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974","https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49","https://github.com/rails/rails","https://github.com/rails/rails/releases/tag/v7.2.3.1","https://github.com/rails/rails/releases/tag/v8.0.4.1","https://github.com/rails/rails/releases/tag/v8.1.2.1","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33169.yml"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-cg4j-q9v8-6v38","url":"https://osv.dev/vulnerability/GHSA-cg4j-q9v8-6v38"},{"source":"nvd","source_id":"CVE-2026-33169","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33169"}],"summary":"Rails Active Support has a possible ReDoS vulnerability in number_to_delimited"}