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CVE-2026-61915

7.1, high

Cyrusimap Cyrus IMAP Double Free Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.1, high high CVSS v3.1
EPSS, next 30 days
0.3% higher than 16.3% of scored CVEs
Exploitation
No public evidence
Published
9 Sept 2026a month ago

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.

Details

Vendor
Cyrusimap
Product
Cyrus IMAP
Weakness
CWE-415 (opens in a new tab)
Status
Analyzed
Updated
16 Sept 2026
Assigner
cve@mitre.org

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

References 4

Other references 4

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Beyond this page

Is CVE-2026-61915 in your network?

This page tells you how dangerous CVE-2026-61915 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Find it before attackers do

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 18 Oct 2026, not the live upstream state.