Go/github.com/mattermost/mattermost/server/v8 CVE-2026-4265: medium 4.3, EPSS 0.23%
Mattermost fails to validate team-specific upload_file permissions in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260107144005-c7f6efdfb035 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260107144005-c7f6efdfb035Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 8.0.0-20260107144005-c7f6efdfb035 | - |
Fixed versions
| 8.0.0-20260107144005-c7f6efdfb035 |
Sources
- osv: GO-2026-4749#Go/github.com/mattermost/mattermost/server/v8
- nvd: CVE-2026-4265
- https://github.com/advisories/GHSA-xpvf-6qcc-9jqc
- https://github.com/mattermost/mattermost/commit/c7f6efdfb035490f494b3177996ee5f4b278c988
- https://mattermost.com/security-updates
CVE-2026-4265 · published · modified · JSON