{"id":"CVE-2026-33167","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-33167","generatedAt":"2026-10-28T02:10:35.910Z","title":"A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS.","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.","published":"2026-03-23T23:17:13.000Z","lastModified":"2026-08-12T16:45:37.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":1.3,"severity":"LOW","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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79"],"affected":["rubyonrails/rails"],"epss":{"score":0.0026,"percentile":0.17604,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.2.1","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33167","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}