{"id":"CVE-2026-115938","published":"2026-10-23T22:16:59.597","lastModified":"2026-10-26T18:34:17.050","description":"Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft’s allowed column filter delegates property lookup to Yii ArrayHelper, outside Twig’s SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox’s empty property/method allowlists.\n\n\n\nThe vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID 1 when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.\n\n\n\nAfter recovering GeneralConfig::securityKey, the same user can compute Craft’s generic HMAC wire format offline. Signed parameters such as redirect are then accepted and passed to unsandboxed View::renderObjectTemplate(), where Twig’s string-callable form can invoke native PHP callables. The regression proof uses the harmless substr() callback and observes abcdef becoming cdef; it does not execute an OS command.","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-1336"],"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-v4q3-2g5g-wjj6","tags":[]},{"url":"https://www.hckrt.com/hacktivity/HCKRT-DRNL9W","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-v4q3-2g5g-wjj6","tags":[]}],"hasPoc":true,"ai":null}