Go/github.com/mattermost/mattermost/server/v8 CVE-2026-3590: medium 6.5, EPSS 0.15%
Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250723052842-4cb8d8940332 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250723052842-4cb8d8940332Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250721062209-4952acea88ce | 8.0.0-20250723052842-4cb8d8940332 | - |
Fixed versions
| 8.0.0-20250723052842-4cb8d8940332 |
Sources
- osv: GHSA-mh4x-rmrx-3hp4
- https://nvd.nist.gov/vuln/detail/CVE-2026-3590
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-3590 · published · modified · JSON