Go/github.com/mattermost/mattermost-server/v5 CVE-2026-6334: low 3.8, EPSS 0.12%
Mattermost doesn't enforce client identity binding during the OAuth authorization code redemption flow 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-2026-5474#Go/github.com/mattermost/mattermost-server/v5
- nvd: CVE-2026-6334
- https://github.com/advisories/GHSA-jp3f-x449-4q75
- https://github.com/mattermost/mattermost/commit/e9ae890a013bb57989fcbdb548d8b7b86b240237
- https://mattermost.com/security-updates
CVE-2026-6334 · published · modified · JSON