Go/github.com/mattermost/mattermost-server CVE-2026-4273: low 3.7, EPSS 0.14%
Mattermost doesn't validate that the RefreshedToken differs from the original invite token during remote cluster invite confirmation
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260313190740-742e0be95074 or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20260313190740-742e0be95074Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.3.2-0.20260313190740-742e0be95074 | - |
Fixed versions
| 5.3.2-0.20260313190740-742e0be95074 |
Sources
- osv: GHSA-hqpj-f3jh-29vx#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-4273
- https://github.com/mattermost/mattermost/commit/742e0be9507454a7e662668e1d9ec1b94b636e9b
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-4273 · published · modified · JSON