Go/github.com/mattermost/mattermost/server/v8 CVE-2026-6334: low 3.1, EPSS 0.12%
Mattermost doesn't enforce client identity binding during the OAuth authorization code redemption flow
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260318173148-e9ae890a013b or later.
go get github.com/mattermost/mattermost/server/v8@v11.5.2go get github.com/mattermost/mattermost/server/v8@v10.11.14go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260318173148-e9ae890a013bAffected
| introduced | fixed | last affected |
|---|---|---|
| 11.5.0 | 11.5.2 | - |
| 10.11.0 | 10.11.14 | - |
| 0 | 8.0.0-20260318173148-e9ae890a013b | - |
Fixed versions
| 11.5.2 | 10.11.14 | 8.0.0-20260318173148-e9ae890a013b |
Sources
- osv: GHSA-jp3f-x449-4q75
- https://nvd.nist.gov/vuln/detail/CVE-2026-6334
- https://github.com/mattermost/mattermost/commit/e9ae890a013bb57989fcbdb548d8b7b86b240237
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-6334 · published · modified · JSON