Go/github.com/mattermost/mattermost/server/v8 CVE-2026-2457: medium 4.3, EPSS 0.11%

Mattermost allows attackers to spoof permalink embeds

Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260123211116-9efe617be8b8 or later.

go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260123211116-9efe617be8b8

Affected

Fixed versions

Sources

• osv: GHSA-ph22-fw5m-w2q9
• 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 2026-03-16T15:30:42Z · modified 2026-03-23T18:56:18.286997Z · JSON