CVE-2026-0999
6 advisories.
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-0999: medium 5.4
Mattermost fails to properly validate login method restrictions
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251212052346-61651b0df7ea or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251212052346-61651b0df7eaAffected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 8.0.0-20251212052346-61651b0df7ea | - |
Fixed versions
| 8.0.0-20251212052346-61651b0df7ea |
Sources
- osv: GHSA-3c9r-7f29-qp32
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-0999: medium 5.4
Mattermost fails to properly validate login method restrictions
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20251212052346-61651b0df7ea or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20251212052346-61651b0df7eaAffected
| introduced | fixed | last affected |
|---|---|---|
| 11.1.0 | - | - |
| 10.11.0 | - | - |
| 11.2.0 | - | - |
| 0 | 5.3.2-0.20251212052346-61651b0df7ea | - |
Fixed versions
| 5.3.2-0.20251212052346-61651b0df7ea |
Sources
- osv: GHSA-3c9r-7f29-qp32#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-0999: unknown
Mattermost fails to properly validate login method restrictions in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
| 10.11.0+incompatible | - | - |
| 11.1.0+incompatible | - | - |
| 11.2.0+incompatible | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-4520
- https://github.com/advisories/GHSA-3c9r-7f29-qp32
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v5 CVE-2026-0999: unknown
Mattermost fails to properly validate login method restrictions 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-2026-4520#Go/github.com/mattermost/mattermost-server/v5
- https://github.com/advisories/GHSA-3c9r-7f29-qp32
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v6 CVE-2026-0999: unknown
Mattermost fails to properly validate login method restrictions 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-2026-4520#Go/github.com/mattermost/mattermost-server/v6
- https://github.com/advisories/GHSA-3c9r-7f29-qp32
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-0999: unknown
Mattermost fails to properly validate login method restrictions in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251212052346-61651b0df7ea or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251212052346-61651b0df7eaAffected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 8.0.0-20251212052346-61651b0df7ea | - |
Fixed versions
| 8.0.0-20251212052346-61651b0df7ea |
Sources
- osv: GO-2026-4520#Go/github.com/mattermost/mattermost/server/v8
- https://github.com/advisories/GHSA-3c9r-7f29-qp32
- https://nvd.nist.gov/vuln/detail/CVE-2026-0999
- https://github.com/mattermost/mattermost/commit/61651b0df7ea5db55d1e54f8d6fb5fce4149309c
- https://mattermost.com/security-updates
CVE-2026-0999 · published · modified · JSON