| id: GO-2026-5474 |
| modules: |
| - module: github.com/mattermost/mattermost-server |
| versions: |
| - introduced: 10.11.0+incompatible |
| - fixed: 10.11.14+incompatible |
| - introduced: 11.5.0+incompatible |
| - fixed: 11.5.2+incompatible |
| vulnerable_at: 11.5.2-rc3+incompatible |
| - module: github.com/mattermost/mattermost-server/v5 |
| non_go_versions: |
| - fixed: 5.3.2-0.20260318173148-e9ae890a013b |
| vulnerable_at: 5.39.3 |
| - module: github.com/mattermost/mattermost-server/v6 |
| vulnerable_at: 6.7.2 |
| - module: github.com/mattermost/mattermost/server/v8 |
| versions: |
| - fixed: 8.0.0-20260318173148-e9ae890a013b |
| summary: |- |
| Mattermost doesn't enforce client identity binding during the OAuth |
| authorization code redemption flow in github.com/mattermost/mattermost-server |
| cves: |
| - CVE-2026-6334 |
| ghsas: |
| - GHSA-jp3f-x449-4q75 |
| references: |
| - advisory: https://github.com/advisories/GHSA-jp3f-x449-4q75 |
| - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-6334 |
| - web: https://github.com/mattermost/mattermost/commit/e9ae890a013bb57989fcbdb548d8b7b86b240237 |
| - web: https://mattermost.com/security-updates |
| notes: |
| - fix: 'github.com/mattermost/mattermost/server/v8: could not add vulnerable_at: could not find tagged version between introduced and fixed' |
| source: |
| id: GHSA-jp3f-x449-4q75 |
| created: 2026-06-25T15:46:18.494187186-04:00 |
| review_status: UNREVIEWED |
