{"id":"CVE-2026-77401","published":"2026-09-16T15:17:46.617","lastModified":"2026-09-16T19:17:38.167","description":"Zope AccessControl provides a general security framework for use in Zope. Prior to 7.4, applications that allow untrusted users to create and execute AccessControl-controlled Python code do not safely guard str.format and str.format_map when those methods are reached through a str subclass. In both ImplPython.py and cAccessControl.c, Python formatting can recursively access attributes and subscriptions using unrestricted getattr and getitem behavior instead of the policy-restricted getattr and getitem operations. A controlled format string can therefore disclose objects reachable from values available to the formatting operation. This issue is fixed in version 7.4.","cvssScore":6.8,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","cwes":["CWE-693"],"vendors":[],"products":[],"references":[{"url":"https://github.com/zopefoundation/AccessControl/commit/f980450eea416718be62847f34dfd51822938e43","tags":[]},{"url":"https://github.com/zopefoundation/AccessControl/releases/tag/7.4","tags":[]},{"url":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-pq59-9fq7-m886","tags":[]}],"exploitRefs":[{"url":"https://github.com/zopefoundation/AccessControl/commit/f980450eea416718be62847f34dfd51822938e43","tags":[]},{"url":"https://github.com/zopefoundation/AccessControl/releases/tag/7.4","tags":[]},{"url":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-pq59-9fq7-m886","tags":[]}],"hasPoc":true,"ai":null}