Go/github.com/mattermost/mattermost-server CVE-2026-2457: medium 4.3, EPSS 0.11%
Mattermost allows attackers to spoof permalink embeds
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260123211116-9efe617be8b8 or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20260123211116-9efe617be8b8go get github.com/mattermost/mattermost-server@v10.11.11go get github.com/mattermost/mattermost-server@v11.2.3go get github.com/mattermost/mattermost-server@v11.3.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.3.2-0.20260123211116-9efe617be8b8 | - |
| 10.11.0-rc1 | 10.11.11 | - |
| 11.2.0-rc1 | 11.2.3 | - |
| 11.3.0-rc1 | 11.3.1 | - |
Fixed versions
| 5.3.2-0.20260123211116-9efe617be8b8 | 10.11.11 | 11.2.3 | 11.3.1 |
Sources
- osv: GHSA-ph22-fw5m-w2q9#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-2457
- https://github.com/mattermost/mattermost/commit/9efe617be8b8f1d036e12721e8e73b69a543ed34
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-2457 · published · modified · JSON