{"id":"CVE-2026-115935","published":"2026-10-23T22:16:59.290","lastModified":"2026-10-26T18:39:42.503","description":"The app/process-api-response-headers action accepts fake Craft API response headers from any authenticated control panel user.\n\n\n\nA non-admin user with only accessCp can place newline characters in X-Craft-Plugin-Licenses. Craft passes this value to its .env writer without removing the newlines.\n\n\n\nThis lets the user insert a new attacker-known CRAFT_SECURITY_KEY into .env. After Craft loads that key, the user can forge a signed login redirect containing a Twig system() callback.\n\n\n\nThis is different from the previous report. That report reads the existing key through a Twig sandbox bypass. This report replaces the key through fake API headers and CRLF injection. Fixing either source does not fix the other.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-94"],"vendors":[],"products":[],"references":[{"url":"https://github.com/craftcms/cms","tags":[]},{"url":"https://github.com/craftcms/cms/releases/tag/5.11.2","tags":[]},{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-9hp6-3565-gvh5","tags":[]},{"url":"https://www.hckrt.com/hacktivity/HCKRT-WM3VSE","tags":[]}],"exploitRefs":[{"url":"https://github.com/craftcms/cms","tags":[]},{"url":"https://github.com/craftcms/cms/releases/tag/5.11.2","tags":[]},{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-9hp6-3565-gvh5","tags":[]}],"hasPoc":true,"ai":null}