{"action":"Upgrade actionpack to 8.1.2.1 or later.","affected":[{"fixed":"8.1.2.1","introduced":"8.1.0"}],"component":"actionpack","cve_ids":["CVE-2026-33167"],"ecosystem":"RubyGems","epss":0.0026,"exploited":false,"fixed_versions":["8.1.2.1"],"ghsa_id":"GHSA-pgm4-439c-5jp6","id":"tcs_01M5KEMJV0JZQ07GVDDZGQKX31","modified_at":"2026-09-10T03:50:40.310151551Z","published_at":"2026-03-23T20:45:15Z","references":["https://osv.dev/vulnerability/GHSA-pgm4-439c-5jp6","https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6","https://nvd.nist.gov/vuln/detail/CVE-2026-33167","https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0","https://github.com/rails/rails","https://github.com/rails/rails/releases/tag/v8.1.2.1","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2026-33167.yml"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-pgm4-439c-5jp6","url":"https://osv.dev/vulnerability/GHSA-pgm4-439c-5jp6"},{"source":"nvd","source_id":"CVE-2026-33167","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33167"}],"summary":"Rails has a possible XSS vulnerability in its Action Pack debug exceptions"}