| id: GO-2026-4495 |
| modules: |
| - module: github.com/mattermost/mattermost-server |
| versions: |
| - introduced: 10.11.0+incompatible |
| - fixed: 10.11.10+incompatible |
| vulnerable_at: 10.11.9+incompatible |
| summary: |- |
| Mattermost doesn't properly validate channel membership at the time of data |
| retrieval in github.com/mattermost/mattermost-server |
| cves: |
| - CVE-2026-20796 |
| ghsas: |
| - GHSA-2xf7-hmf6-p64j |
| references: |
| - advisory: https://github.com/advisories/GHSA-2xf7-hmf6-p64j |
| - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-20796 |
| - web: https://mattermost.com/security-updates |
| source: |
| id: GHSA-2xf7-hmf6-p64j |
| created: 2026-02-23T12:21:10.157540435-05:00 |
| review_status: UNREVIEWED |
