{"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-2026-33170"],"ecosystem":"RubyGems","epss":0.00348,"exploited":false,"fixed_versions":["8.1.2.1","8.0.4.1","7.2.3.1"],"ghsa_id":"GHSA-89vf-4333-qx8v","id":"tcs_01M5KEHZCQBKZMG7P6XNMWWX89","modified_at":"2026-09-10T03:50:38.175334274Z","published_at":"2026-03-23T20:53:28Z","references":["https://osv.dev/vulnerability/GHSA-89vf-4333-qx8v","https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v","https://nvd.nist.gov/vuln/detail/CVE-2026-33170","https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7","https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db","https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb","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-2026-33170.yml"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-89vf-4333-qx8v","url":"https://osv.dev/vulnerability/GHSA-89vf-4333-qx8v"},{"source":"nvd","source_id":"CVE-2026-33170","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33170"}],"summary":"Rails Active Support has a possible XSS vulnerability in SafeBuffer#%"}