tocsin

Go/github.com/mattermost/mattermost/server/v8 CVE-2026-20719: medium 4.3, EPSS 0.36%

Mattermost: Authenticated DoS through failure to prevent rendering of external SVGs on link embeds

Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260217110922-b7d4a1f1f59b or later.

go get github.com/mattermost/mattermost/server/v8@v11.4.1
go get github.com/mattermost/mattermost/server/v8@v11.3.2
go get github.com/mattermost/mattermost/server/v8@v11.2.4
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260217110922-b7d4a1f1f59b
go get github.com/mattermost/mattermost/server/v8@v10.11.2

Affected

introducedfixedlast affected
11.4.0-rc111.4.1-
11.3.0-rc111.3.2-
11.2.0-rc111.2.4-
8.0.0-20260105080200-d27a2195068d8.0.0-20260217110922-b7d4a1f1f59b-
10.11.0-rc110.11.2-

Fixed versions

11.4.111.3.211.2.48.0.0-20260217110922-b7d4a1f1f59b10.11.2

Sources

CVE-2026-20719 · published · modified · JSON