MEDIUM6.5
GO-2026-4325
Mattermost is vulnerable to CPU exhaustion via crafted HTTP request in github.com/mattermost/mattermost-server
Quick fix
GO-2026-4325 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v10.11.9+incompatibleDetails
Mattermost is vulnerable to CPU exhaustion via crafted HTTP request in github.com/mattermost/mattermost-server.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: .
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost-server
Introduced in:
10.11.0+incompatibleFixed in: 10.11.9+incompatibleFix
go get github.com/mattermost/mattermost-server@v10.11.9+incompatibleReferences
- https://github.com/advisories/GHSA-9r42-rhw3-2222[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2025-14822[ADVISORY]
- https://github.com/mattermost/mattermost/commit/4d86263f5430d0eb991fc52ec886cf778cb072e6[WEB]
- https://github.com/mattermost/mattermost/commit/b3d6c0c564c1a79e54e5105d0a8b60fc58a2bdee[WEB]
- https://mattermost.com/security-updates[WEB]