CVE-2026-25780

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.10 Mattermost versions 11.2.0 through 11.2.2 Mattermost versions 11.3.0

Description Mattermost does not properly limit memory allocation when processing DOC files. This allows an authenticated attacker to exhaust server memory and cause a denial of service by uploading a specially crafted DOC file.

Recommendations Update Mattermost to a version later than 10.11.10. Update Mattermost to a version later than 11.2.2. Update Mattermost to a version later than 11.3.0.