Go/github.com/mattermost/mattermost-server/v5 CVE-2026-5163: unknown, EPSS 0.34%
Mattermost doesn't verify channel membership when processing AI-assisted message rewrites in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-5263#Go/github.com/mattermost/mattermost-server/v5
- https://github.com/advisories/GHSA-8r89-8w26-cq32
- https://nvd.nist.gov/vuln/detail/CVE-2026-5163
- https://github.com/mattermost/mattermost/commit/f4d1abe7e8f545f1a87f463fa9fe451c731aebf8
- https://mattermost.com/security-updates
CVE-2026-5163 · published · modified · JSON