CVE-2026-9602
Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods
CVSS Score
5.7
EPSS Score
0.0%
EPSS Percentile
0th
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
| CWE | CWE-400 |
| Vendor | mattermost |
| Product | mattermost |
| Published | Jul 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Mattermost / Mattermost
0 ≤ 6.0.2 0 ≤ 5.6.13
Credits
game0v3r