| id: GO-2026-5663 |
| modules: |
| - module: github.com/mattermost/mattermost-server |
| versions: |
| - introduced: 10.11.0+incompatible |
| - fixed: 10.11.12+incompatible |
| - introduced: 11.2.0+incompatible |
| - fixed: 11.2.4+incompatible |
| - introduced: 11.3.0+incompatible |
| - fixed: 11.3.2+incompatible |
| - introduced: 11.4.0+incompatible |
| - fixed: 11.4.1+incompatible |
| vulnerable_at: 11.4.1-rc2+incompatible |
| - module: github.com/mattermost/mattermost-server/v5 |
| 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: |
| - introduced: 8.0.0-20260105080200-d27a2195068d |
| - fixed: 8.0.0-20260217110922-b7d4a1f1f59b |
| summary: |- |
| Mattermost doesn't validate decompressed archive entry sizes during file |
| extraction in github.com/mattermost/mattermost-server |
| cves: |
| - CVE-2026-3114 |
| ghsas: |
| - GHSA-vhgh-g7x8-4rx8 |
| references: |
| - advisory: https://github.com/advisories/GHSA-vhgh-g7x8-4rx8 |
| - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-3114 |
| - 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-vhgh-g7x8-4rx8 |
| created: 2026-06-25T15:46:16.686226933-04:00 |
| review_status: UNREVIEWED |
