GO-2026-5769
Mattermost doesn't validate the X-Requested-With header on the burn-on-read reveal endpoint in github.com/mattermost/mattermost-server
Quick fix
GO-2026-5769 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v11.4.4+incompatibleDetails
Mattermost doesn't validate the X-Requested-With header on the burn-on-read reveal endpoint 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: github.com/mattermost/mattermost-server/v5 before v5.3.2-0.20260327001745-7a339a6438f5.
Are you affected?
Enter the version of the package you're using.
Affected packages
11.4.0+incompatibleFixed in: 11.4.4+incompatiblego get github.com/mattermost/mattermost-server@v11.4.4+incompatible0No fixed version published yet for github.com/mattermost/mattermost-server/v5 (go modules). Pin to a known-safe version or switch to an alternative.
0No fixed version published yet for github.com/mattermost/mattermost-server/v6 (go modules). Pin to a known-safe version or switch to an alternative.
0Fixed in: 8.0.0-20260327001745-7a339a6438f5go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260327001745-7a339a6438f5