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{"timestamp":"2026-07-17T12:54:18.132613Z","id":"CVE-2026-9602","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

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

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

CWE-400

https://mattermost.com/security-updates

[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"6.0.2","versionType":"semver","status":"affected"},{"version":"0","lessThanOrEqual":"5.6.13","versionType":"semver","status":"affected"},{"version":"6.3.0","status":"unaffected"},{"version":"6.2.1.0","status":"unaffected"},{"version":"5.13.7.0","status":"unaffected"}]}]