MEDIUM6.5
GO-2026-5454
Mattermost doesn't validate the response body of proxied images in github.com/mattermost/mattermost-server
Quick fix
GO-2026-5454 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v0.0.0-20260414103857-b21ef302025eDetails
Mattermost doesn't validate the response body of proxied images in github.com/mattermost/mattermost-server
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/mattermost/mattermost-server
Introduced in:
0.0.0-20250731163400-5b955468ea1eFixed in: 0.0.0-20260414103857-b21ef302025eFix
go get github.com/mattermost/mattermost-server@v0.0.0-20260414103857-b21ef302025e