{"id":"CVE-2026-61915","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-61915","generatedAt":"2026-10-28T07:05:22.139Z","title":"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.","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.","published":"2026-09-09T20:18:37.000Z","lastModified":"2026-09-16T15:23:52.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H"},"cwe":["CWE-415"],"affected":["cyrus/imap"],"epss":{"score":0.00259,"percentile":0.1746,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://cyrusimap.org","tags":["Product"],"source":"cve@mitre.org"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html","tags":["Release Notes"],"source":"cve@mitre.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-61915","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}