CVE-2026-6689
6 advisories.
Go/github.com/mattermost/mattermost-server CVE-2026-6689: medium 4.3
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation
Action: Upgrade github.com/mattermost/mattermost-server to 10.11.17 or later.
go get github.com/mattermost/mattermost-server@v11.6.1go get github.com/mattermost/mattermost-server@v11.5.5go get github.com/mattermost/mattermost-server@v10.11.17Affected
| introduced | fixed | last affected |
|---|---|---|
| 11.6.0 | 11.6.1 | - |
| 11.5.0 | 11.5.5 | - |
| 10.11.0 | 10.11.17 | - |
Fixed versions
| 11.6.1 | 11.5.5 | 10.11.17 |
Sources
- osv: GHSA-c28q-m4gf-vg4q
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
- https://github.com/mattermost/mattermost
CVE-2026-6689 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-6689: medium 4.3
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260501144115-7d6816abdfd1 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260501144115-7d6816abdfd1Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250731163400-5b955468ea1e | 8.0.0-20260501144115-7d6816abdfd1 | - |
Fixed versions
| 8.0.0-20260501144115-7d6816abdfd1 |
Sources
- osv: GHSA-c28q-m4gf-vg4q#Go/github.com/mattermost/mattermost/server/v8
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
- https://github.com/mattermost/mattermost
CVE-2026-6689 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-6689: unknown
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost-server to 10.11.17+incompatible or later.
go get github.com/mattermost/mattermost-server@v10.11.17+incompatiblego get github.com/mattermost/mattermost-server@v11.5.5+incompatiblego get github.com/mattermost/mattermost-server@v11.6.1+incompatibleAffected
| introduced | fixed | last affected |
|---|---|---|
| 10.11.0+incompatible | 10.11.17+incompatible | - |
| 11.5.0+incompatible | 11.5.5+incompatible | - |
| 11.6.0+incompatible | 11.6.1+incompatible | - |
Fixed versions
| 10.11.17+incompatible | 11.5.5+incompatible | 11.6.1+incompatible |
Sources
- osv: GO-2026-6283
- https://github.com/advisories/GHSA-c28q-m4gf-vg4q
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
CVE-2026-6689 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v5 CVE-2026-6689: unknown
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation 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-2026-6283#Go/github.com/mattermost/mattermost-server/v5
- https://github.com/advisories/GHSA-c28q-m4gf-vg4q
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
CVE-2026-6689 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v6 CVE-2026-6689: unknown
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation 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-2026-6283#Go/github.com/mattermost/mattermost-server/v6
- https://github.com/advisories/GHSA-c28q-m4gf-vg4q
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
CVE-2026-6689 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-6689: unknown
Mattermost doesn't enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260501144115-7d6816abdfd1 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260501144115-7d6816abdfd1Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250731163400-5b955468ea1e | 8.0.0-20260501144115-7d6816abdfd1 | - |
Fixed versions
| 8.0.0-20260501144115-7d6816abdfd1 |
Sources
- osv: GO-2026-6283#Go/github.com/mattermost/mattermost/server/v8
- https://github.com/advisories/GHSA-c28q-m4gf-vg4q
- https://nvd.nist.gov/vuln/detail/CVE-2026-6689
- https://github.com/mattermost/mattermost/commit/2dea05864024b3254fb28c5ed679592e2b7cd672
- https://github.com/mattermost/mattermost/commit/3a96344214b1a84df70d97052d46b6f2b40b0caa
- https://github.com/mattermost/mattermost/commit/479fc42d0ec6da48e76b59608233d90bfc69769d
- https://github.com/mattermost/mattermost/commit/7d6816abdfd170169f717aea43c5716a1f9ef6b0
- https://github.com/mattermost/mattermost/commit/977c791e5b54bc14fdb96a2b3dacc85da5d8c623
- https://github.com/mattermost/mattermost/pull/36188
- https://github.com/mattermost/mattermost/pull/36375
- https://github.com/mattermost/mattermost/pull/36383
- https://github.com/mattermost/mattermost/pull/36384
- https://github.com/mattermost/mattermost/pull/36402
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
CVE-2026-6689 · published · modified · JSON