| id: GO-2026-4729 |
| modules: |
| - module: github.com/mattermost/mattermost-server |
| versions: |
| - introduced: 10.11.0-rc1+incompatible |
| - fixed: 10.11.11+incompatible |
| - introduced: 11.2.0-rc1+incompatible |
| - fixed: 11.2.3+incompatible |
| - introduced: 11.3.0-rc1+incompatible |
| - fixed: 11.3.1+incompatible |
| vulnerable_at: 11.3.1-rc1+incompatible |
| - module: github.com/mattermost/mattermost-server/v5 |
| non_go_versions: |
| - fixed: 5.3.2-0.20260113182106-a18b80ba4c32 |
| vulnerable_at: 5.39.3 |
| - module: github.com/mattermost/mattermost-server/v6 |
| vulnerable_at: 6.7.2 |
| - module: github.com/mattermost/mattermost/server/v8 |
| versions: |
| - fixed: 8.0.0-20260113182106-a18b80ba4c32 |
| summary: |- |
| Mattermost allows a removed team member to enumerate all public channels within |
| a private team in github.com/mattermost/mattermost-server |
| cves: |
| - CVE-2026-2458 |
| ghsas: |
| - GHSA-679f-wmrg-qf57 |
| references: |
| - advisory: https://github.com/advisories/GHSA-679f-wmrg-qf57 |
| - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-2458 |
| - web: https://github.com/mattermost/mattermost/commit/a18b80ba4c324b74b3d47951c33957305af4a099 |
| - web: https://mattermost.com/security-updates |
| notes: |
| - fix: 'github.com/mattermost/mattermost/server/v8: could not add vulnerable_at: could not find tagged version between introduced and fixed' |
| source: |
| id: GHSA-679f-wmrg-qf57 |
| created: 2026-03-23T13:08:34.610186318-04:00 |
| review_status: UNREVIEWED |
