CVE-2026-61915

medium

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.

References

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html

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://cyrusimap.org

Details

Source: Mitre, NVD

Published: 2026-09-09

Updated: 2026-09-10

Risk Information

CVSS v2

Base Score: 3.6

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:P/A:P

Severity: Low

CVSS v3

Base Score: 4.2

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

Severity: Medium

EPSS

EPSS: 0.00217