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      <title>CVE-2026-77401 — Zope AccessControl: Information disclosure through Python string `format` and `format_map` functions</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-77401</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; zopefoundation AccessControl&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; zopefoundation AccessControl&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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