EUVD-2026-80790Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
PR:H because the attacker must already be permitted to author/run restricted Python; S:C for the sandbox escape; C:H info disclosure only, so I:N/A:N.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Information disclosure in Zope AccessControl (zopefoundation AccessControl) versions prior to 7.4 allows authenticated users who already hold through-the-web Python code-authoring privileges to break out of the restricted-execution sandbox and read objects that the security policy is supposed to hide. Reaching str.format or str.format_map through a str subclass bypasses AccessControl's policy-restricted getattr and getitem guards, so a crafted format string can recursively walk attributes and subscriptions to disclose objects reachable from the values available to the formatting call. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a deployment that lets untrusted users create and execute AccessControl-controlled Python code (RestrictedPython / through-the-web scripting), and the attacker must already hold that code-authoring privilege (PR:H). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but access-gated sandbox-escape/information-disclosure flaw, not a mass-exploitation priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to AccessControl 7.4 or later (for example 'pip install -U "AccessControl>=7.4"'), which is the vendor-released patch containing commit f980450eea416718be62847f34dfd51822938e43; consult https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-pq59-9fq7-m886 and https://github.com/zopefoundation/AccessControl/releases/tag/7.4 for the authoritative fix details. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Information Disclosure
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External POC / Exploit Code
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