CVE-2026-61915

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.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://cyrusimap.org	Product
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html	Release Notes
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html	Release Notes
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html	Release Notes

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cyrus:imap::::::::
	cpe:2.3:a:cyrus:imap::::::::
	cpe:2.3:a:cyrus:imap::::::::

History

16 Sep 2026, 15:23

Type	Values Removed	Values Added
First Time		Cyrus Cyrus imap
CPE		cpe:2.3:a:cyrus:imap::::::::
References	~~() https://cyrusimap.org -~~	() https://cyrusimap.org - Product
References	~~() 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/3.10/x/3.10.4.html - Release Notes
References	~~() 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/3.12/x/3.12.4.html - Release Notes
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/3.8/x/3.8.8.html - Release Notes

Information

Published : 2026-09-09 20:18

Updated : 2026-09-16 15:23

NVD link : CVE-2026-61915

Mitre link : CVE-2026-61915

CVE.ORG link : CVE-2026-61915

JSON object : View

Products Affected

cyrus

imap

CWE

CWE-415

Double Free

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