CVE-2026-28741
5 advisories.
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-28741: medium 6.8
Mattermost doesn't validate CSRF tokens on an authentication endpoint
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260220133927-c29cf05d40f8 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260220133927-c29cf05d40f8go get github.com/mattermost/mattermost/server/v8@v11.5.0go get github.com/mattermost/mattermost/server/v8@v11.4.3go get github.com/mattermost/mattermost/server/v8@v11.3.3Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250721062209-4952acea88ce | 8.0.0-20260220133927-c29cf05d40f8 | - |
| 11.5.0-rc1 | 11.5.0 | - |
| 11.4.0-rc1 | 11.4.3 | - |
| 11.3.0-rc1 | 11.3.3 | - |
Fixed versions
| 8.0.0-20260220133927-c29cf05d40f8 | 11.5.0 | 11.4.3 | 11.3.3 |
Sources
- osv: GHSA-m7cf-4gh2-v4qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28741
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-28741: unknown
Mattermost doesn't validate CSRF tokens on an authentication endpoint in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost-server to 11.3.3+incompatible or later.
go get github.com/mattermost/mattermost-server@v11.3.3+incompatiblego get github.com/mattermost/mattermost-server@v11.4.3+incompatiblego get github.com/mattermost/mattermost-server@v11.5.0+incompatibleAffected
| introduced | fixed | last affected |
|---|---|---|
| 11.3.0-rc1+incompatible | 11.3.3+incompatible | - |
| 11.4.0-rc1+incompatible | 11.4.3+incompatible | - |
| 11.5.0-rc1+incompatible | 11.5.0+incompatible | - |
Fixed versions
| 11.3.3+incompatible | 11.4.3+incompatible | 11.5.0+incompatible |
Sources
- osv: GO-2026-5495
- https://github.com/advisories/GHSA-m7cf-4gh2-v4qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28741
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v5 CVE-2026-28741: unknown
Mattermost doesn't validate CSRF tokens on an authentication endpoint 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-2026-5495#Go/github.com/mattermost/mattermost-server/v5
- https://github.com/advisories/GHSA-m7cf-4gh2-v4qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28741
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v6 CVE-2026-28741: unknown
Mattermost doesn't validate CSRF tokens on an authentication endpoint 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-2026-5495#Go/github.com/mattermost/mattermost-server/v6
- https://github.com/advisories/GHSA-m7cf-4gh2-v4qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28741
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-28741: unknown
Mattermost doesn't validate CSRF tokens on an authentication endpoint in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260220133927-c29cf05d40f8 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260220133927-c29cf05d40f8Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250721062209-4952acea88ce | 8.0.0-20260220133927-c29cf05d40f8 | - |
Fixed versions
| 8.0.0-20260220133927-c29cf05d40f8 |
Sources
- osv: GO-2026-5495#Go/github.com/mattermost/mattermost/server/v8
- https://github.com/advisories/GHSA-m7cf-4gh2-v4qg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28741
- https://mattermost.com/security-updates
CVE-2026-28741 · published · modified · JSON