Go/github.com/mattermost/mattermost/server/v8 CVE-2026-3637: medium 4.3, EPSS 0.15%
Mattermost doesn't check the create_post channel permission during post edit operations
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260316171743-090408f09f53 or later.
go get github.com/mattermost/mattermost/server/v8@v10.11.14go get github.com/mattermost/mattermost/server/v8@v11.4.4go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260316171743-090408f09f53go get github.com/mattermost/mattermost/server/v8@v11.5.2Affected
| introduced | fixed | last affected |
|---|---|---|
| 10.11.0 | 10.11.14 | - |
| 11.4.0 | 11.4.4 | - |
| 0 | 8.0.0-20260316171743-090408f09f53 | - |
| 11.5.0 | 11.5.2 | - |
Fixed versions
| 10.11.14 | 11.4.4 | 8.0.0-20260316171743-090408f09f53 | 11.5.2 |
Sources
- osv: GHSA-v549-xx3c-6pc8
- https://nvd.nist.gov/vuln/detail/CVE-2026-3637
- https://github.com/mattermost/mattermost/commit/090408f09f53ffc9afc6c65c7c7c1fd3a8cd22f3
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-3637 · published · modified · JSON