CVE-2026-77401
CVE-2026-77401 · Zope AccessControl: Information disclosure through Python string `format` and `format_map` functions
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.8 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
accesscontrol
- Versions
- < 7.4: Affected
No fix published
accesscontrol PyPI
- Versions
- 2.13.0
- 2.13.1
- 2.13.10
- 2.13.11
- 2.13.12
- 2.13.13
- 2.13.14
- 2.13.15
- 2.13.16
- 2.13.2
- 2.13.3
- 2.13.4
- 2.13.5
- 2.13.6
- 2.13.7
- 2.13.8
- 2.13.9
- 3.0
- 3.0.1
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 4.0
- 4.0a1
- 4.0a2
- 4.0a3
- 4.0a4
- 4.0a5
- 4.0a6
- 4.0a7
- 4.0b1
- 4.0b2
- 4.0b3
- 4.0b4
- 4.0b5
- 4.0b6
- 4.0b7
- 4.1
- 4.2
- 4.3
- 4.4
- 5.0
- 5.1
- 5.2
- 5.3
- 5.3.1
- 5.4
- 5.5
- 5.6
- 5.7
- 6.0
- 6.1
- 6.2
- 6.3
- 7.0
- 7.1
- 7.2
- 7.3
- Affected ranges
- ECOSYSTEM: < 7.4
Update to 7.4