tocsin

CVE-2026-5755

2 advisories.

Go/github.com/mattermost/mattermost-server CVE-2026-5755: medium 6.5, EPSS 0.42%

Mattermost doesn't validate the TIFF IFD offset in the image header before allocating memory

Action: Upgrade github.com/mattermost/mattermost-server to 10.11.15 or later.

go get github.com/mattermost/mattermost-server@v11.6.1
go get github.com/mattermost/mattermost-server@v11.5.4
go get github.com/mattermost/mattermost-server@v11.4.5
go get github.com/mattermost/mattermost-server@v10.11.15

Affected

introducedfixedlast affected
11.6.011.6.1-
11.5.011.5.4-
11.4.011.4.5-
10.11.010.11.15-

Fixed versions

11.6.111.5.411.4.510.11.15

Sources

CVE-2026-5755 · published · modified · JSON

Go/github.com/mattermost/mattermost-server CVE-2026-5755: unknown, EPSS 0.42%

Mattermost doesn't validate the TIFF IFD offset in the image header before allocating memory in github.com/mattermost/mattermost-server

Action: Upgrade github.com/mattermost/mattermost-server to 10.11.15+incompatible or later.

go get github.com/mattermost/mattermost-server@v10.11.15+incompatible
go get github.com/mattermost/mattermost-server@v11.4.5+incompatible
go get github.com/mattermost/mattermost-server@v11.5.4+incompatible
go get github.com/mattermost/mattermost-server@v11.6.1+incompatible

Affected

introducedfixedlast affected
10.11.0+incompatible10.11.15+incompatible-
11.4.0+incompatible11.4.5+incompatible-
11.5.0+incompatible11.5.4+incompatible-
11.6.0+incompatible11.6.1+incompatible-

Fixed versions

10.11.15+incompatible11.4.5+incompatible11.5.4+incompatible11.6.1+incompatible

Sources

CVE-2026-5755 · published · modified · JSON