Vulnerability Report

CVE-2026-61915

Title: CVE-2026-61915

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-61915.

CWE Category CWE-415
Published Date Sep 09, 2026
Modified Date Sep 16, 2026
Exploit Status Not Found
Score 4.2 CVSS v3.1
Exploit Probability (EPSS)
0.26%

Vulnerability Summary

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.

Impacted Vendors

U
university_of_washington 1
C
cyrus 1

Reference Links

https://cyrusimap.org 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/3.12/x/3.12.4.html https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.2
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-61915 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

Affected Stack

No specific products linked.