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GO-2026-6279
Mattermost doesn't validate that a username returned during bot registration belongs to a bot account in github.com/mattermost/mattermost-server
Quick fix
GO-2026-6279 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v10.11.17+incompatibleDetails
Mattermost doesn't validate that a username returned during bot registration belongs to a bot account in github.com/mattermost/mattermost-server
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost-server
Introduced in:
10.11.0+incompatibleFixed in: 10.11.17+incompatibleFix
go get github.com/mattermost/mattermost-server@v10.11.17+incompatibleGo/github.com/mattermost/mattermost-server/v5
Introduced in:
0No fixed version published yet for github.com/mattermost/mattermost-server/v5 (go modules). Pin to a known-safe version or switch to an alternative.
Go/github.com/mattermost/mattermost-server/v6
Introduced in:
0No fixed version published yet for github.com/mattermost/mattermost-server/v6 (go modules). Pin to a known-safe version or switch to an alternative.
Go/github.com/mattermost/mattermost/server/v8
Introduced in:
8.0.0-20250731163400-5b955468ea1eFixed in: 8.0.0-20260428151657-c79c3831061aFix
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260428151657-c79c3831061aReferences
- https://github.com/advisories/GHSA-3vmp-whvv-5v9v[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2026-6046[ADVISORY]
- https://github.com/mattermost/mattermost/commit/3be10297c14d272f273d747af70728f9d03c60ec[WEB]
- https://github.com/mattermost/mattermost/commit/98f9778cec1e7f3d97b3d4692fb91f8e7b659972[WEB]
- https://github.com/mattermost/mattermost/commit/aba9339a24d4b287edd77377c19901d6e341bb96[WEB]
- https://github.com/mattermost/mattermost/commit/c79c3831061a0880c0962c7d567c9e24dd35f44c[WEB]
- https://github.com/mattermost/mattermost/commit/f706d1f01e6dfe62cab86c1d257f237daa78106a[WEB]
- https://github.com/mattermost/mattermost/pull/36064[WEB]
- https://github.com/mattermost/mattermost/pull/36305[WEB]
- https://github.com/mattermost/mattermost/pull/36317[WEB]
- https://github.com/mattermost/mattermost/pull/36318[WEB]
- https://github.com/mattermost/mattermost/pull/36320[WEB]
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16[WEB]
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5[WEB]
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2[WEB]
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0[WEB]
- https://mattermost.com/security-updates[WEB]