CVE-2026-77401

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{"affected": [{"affectedData": [{"product": "AccessControl", "vendor": "zopefoundation", "versions": [{"status": "affected", "version": "< 7.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-77401", "lastModified": "2026-09-30T17:43:24.057", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77401", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-16T18:18:37.466466Z", "version": "2.0.3"}}]}, "published": "2026-09-16T15:17:46.617", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/zopefoundation/AccessControl/commit/f980450eea416718be62847f34dfd51822938e43"}, {"source": "security-advisories@github.com", "url": "https://github.com/zopefoundation/AccessControl/releases/tag/7.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-pq59-9fq7-m886"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-693"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,7.4)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "AccessControl", "source": "cna", "vendor": "zopefoundation"}, "product": "accesscontrol", "vendor": "zope"}], "created": "2026-09-16T17:00:08.273471+00:00", "updated": "2026-09-18T02:30:06.423036+00:00", "vendors": ["zope", "zope$PRODUCT$accesscontrol"]}