{"id":"CVE-2026-61915","state":"PUBLISHED","title":"An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing","description":"An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing PATCH-ACTION=\"BYPARAM@...\" against a resource with two or more properties of the matched kind. The memory holding the selector would be freed once on each iteration over the properties.","publishedAt":"2026-09-09T00:00:00.000Z","updatedAt":"2026-09-10T14:47:05.215Z","severity":{"score":4.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L","source":"mitre"},"assigner":"mitre","products":["cyrusimap Cyrus IMAP"],"affected":[{"vendor":"cyrusimap","product":"Cyrus IMAP","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.8","versionType":"semver"},{"version":"3.9.0","status":"affected","lessThan":"3.10.4","versionType":"semver"},{"version":"3.11.0","status":"affected","lessThan":"3.12.4","versionType":"semver"}]}],"references":["https://cyrusimap.org","https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html","https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html","https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html"],"weaknesses":["CWE-415"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61915.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61915","state":"PUBLISHED","datePublished":"2026-09-09T00:00:00.000Z","dateUpdated":"2026-09-10T14:47:05.215Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-07-13T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing PATCH-ACTION=\"BYPARAM@...\" against a resource with two or more properties of the matched kind. The memory holding the selector would be freed once on each iteration over the properties."}],"affected":[{"vendor":"cyrusimap","product":"Cyrus IMAP","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.8","versionType":"semver"},{"version":"3.9.0","status":"affected","lessThan":"3.10.4","versionType":"semver"},{"version":"3.11.0","status":"affected","lessThan":"3.12.4","versionType":"semver"}]}],"references":[{"url":"https://cyrusimap.org"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-415","description":"CWE-415 Double Free","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-09-09T20:06:07.664Z"},"x_generator":{"engine":"enrichogram 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*","versionEndExcluding":"3.8.8"},{"vulnerable":true,"criteria":"cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9.0","versionEndExcluding":"3.10.4"},{"vulnerable":true,"criteria":"cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11.0","versionEndExcluding":"3.12.4"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-10T14:46:56.534339Z","id":"CVE-2026-61915","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-10T14:47:05.215Z"}}]}}}