Go/github.com/mattermost/mattermost/server/v8 CVE-2026-28741: high 8.1, EPSS 0.13%
Mattermost doesn't validate CSRF tokens on an authentication endpoint in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260220133927-c29cf05d40f8 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260220133927-c29cf05d40f8Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250721062209-4952acea88ce | 8.0.0-20260220133927-c29cf05d40f8 | - |
Fixed versions
| 8.0.0-20260220133927-c29cf05d40f8 |
Sources
- osv: GO-2026-5495#Go/github.com/mattermost/mattermost/server/v8
- nvd: CVE-2026-28741
- https://github.com/advisories/GHSA-m7cf-4gh2-v4qg
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON