tocsin

Go/github.com/mattermost/mattermost-server CVE-2026-3114: medium 6.5, EPSS 0.36%

Mattermost doesn't validate decompressed archive entry sizes during file extraction in github.com/mattermost/mattermost-server

Action: Upgrade github.com/mattermost/mattermost-server to 10.11.12+incompatible or later.

go get github.com/mattermost/mattermost-server@v10.11.12+incompatible
go get github.com/mattermost/mattermost-server@v11.2.4+incompatible
go get github.com/mattermost/mattermost-server@v11.3.2+incompatible
go get github.com/mattermost/mattermost-server@v11.4.1+incompatible

Affected

introducedfixedlast affected
10.11.0+incompatible10.11.12+incompatible-
11.2.0+incompatible11.2.4+incompatible-
11.3.0+incompatible11.3.2+incompatible-
11.4.0+incompatible11.4.1+incompatible-

Fixed versions

10.11.12+incompatible11.2.4+incompatible11.3.2+incompatible11.4.1+incompatible

Sources

CVE-2026-3114 · published · modified · JSON