{"id":"CVE-2026-33167","state":"PUBLISHED","title":"Rails has a possible XSS vulnerability in its Action Pack debug exceptions","description":"Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.","publishedAt":"2026-03-23T22:58:53.577Z","updatedAt":"2026-03-24T18:44:13.020Z","severity":{"score":1.3,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","source":"GitHub_M"},"assigner":"GitHub_M","products":["rails actionpack"],"affected":[{"vendor":"rails","product":"actionpack","versions":[{"version":">= 8.1.0, < 8.1.2.1","status":"affected"}]}],"references":["https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6","https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0","https://github.com/rails/rails/releases/tag/v8.1.2.1"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33167.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33167","state":"PUBLISHED","datePublished":"2026-03-23T22:58:53.577Z","dateUpdated":"2026-03-24T18:44:13.020Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-17T21:17:08.888Z"},"containers":{"cna":{"title":"Rails has a possible XSS vulnerability in its Action Pack debug exceptions","descriptions":[{"lang":"en","value":"Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch."}],"affected":[{"vendor":"rails","product":"actionpack","versions":[{"version":">= 8.1.0, < 8.1.2.1","status":"affected"}]}],"references":[{"url":"https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6","name":"https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0","name":"https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0","tags":["x_refsource_MISC"]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.2.1","name":"https://github.com/rails/rails/releases/tag/v8.1.2.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":1.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-23T23:18:56.415Z"},"source":{"advisory":"GHSA-pgm4-439c-5jp6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-24T18:44:05.658370Z","id":"CVE-2026-33167","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-24T18:44:13.020Z"}}]}}}