CVE-2026-9602 — Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods

CVE-2026-9602

Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods PUBLISHED

Description (CNA)

Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00678

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 0 through 6.0.2; affected 0 through 5.6.13; unaffected 6.3.0; unaffected 6.2.1.0; unaffected 5.13.7.0

CWE

CWE-400

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.