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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Cyrus IMAP", "vendor": "cyrusimap", "versions": [{"lessThan": "3.8.8", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "3.10.4", "status": "affected", "version": "3.9.0", "versionType": "semver"}, {"lessThan": "3.12.4", "status": "affected", "version": "3.11.0", "versionType": "semver"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Cyrus IMAP before 3.12.4. CalDAV/CardDAV multiget bypasses a per-href ACL. An authenticated DAV user with some shared access to another user's calendar or address book could read even unshared events or contacts by including the target hrefs in a calendar-multiget or addressbook-multiget REPORT."}], "id": "CVE-2026-61909", "lastModified": "2026-09-09T20:22:32.663", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-09-09T20:18:36.523", "references": [{"source": "cve@mitre.org", "url": "https://cyrusimap.org"}, {"source": "cve@mitre.org", "url": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html"}, {"source": "cve@mitre.org", "url": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html"}, {"source": "cve@mitre.org", "url": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-420"}], "source": "cve@mitre.org", "type": "Primary"}]}

{}

{"created": "2026-09-09T22:15:17.107932+00:00", "title": "CalDAV/CardDAV Multiget ACL Bypass in Cyrus IMAP", "updated": "2026-09-09T22:15:17.107946+00:00", "vendors": []}