Go/github.com/mattermost/mattermost-server CVE-2026-5139: unknown, EPSS 0.29%
Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost-server to 10.11.18+incompatible or later.
go get github.com/mattermost/mattermost-server@v10.11.18+incompatiblego get github.com/mattermost/mattermost-server@v11.5.6+incompatiblego get github.com/mattermost/mattermost-server@v11.6.3+incompatiblego get github.com/mattermost/mattermost-server@v11.7.1+incompatibleAffected
| introduced | fixed | last affected |
|---|---|---|
| 10.11.0+incompatible | 10.11.18+incompatible | - |
| 11.5.0+incompatible | 11.5.6+incompatible | - |
| 11.6.0+incompatible | 11.6.3+incompatible | - |
| 11.7.0+incompatible | 11.7.1+incompatible | - |
Fixed versions
| 10.11.18+incompatible | 11.5.6+incompatible | 11.6.3+incompatible | 11.7.1+incompatible |
Sources
- osv: GO-2026-6480
- https://github.com/advisories/GHSA-2g8v-grq3-hq2g
- https://nvd.nist.gov/vuln/detail/CVE-2026-5139
- https://mattermost.com/security-updates
CVE-2026-5139 · published · modified · JSON