Go/github.com/mattermost/mattermost-server CVE-2026-6340: medium 4.3, EPSS 0.24%
Mattermost doesn't validate 7zip archive structure before processing
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260325191733-fb11968f8798 or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20260325191733-fb11968f8798Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.3.2-0.20260325191733-fb11968f8798 | - |
Fixed versions
| 5.3.2-0.20260325191733-fb11968f8798 |
Sources
- osv: GHSA-cjm8-jxpw-g43m#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-6340
- https://github.com/mattermost/mattermost/commit/fb11968f8798925c7b75711025bc5f991124ba26
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-6340 · published · modified · JSON