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MEDIUM4.3

GO-2026-5173

Mattermost has an Incorrect Authorization issue in github.com/mattermost/mattermost-server

Quick fix

GO-2026-5173 — github.com/mattermost/mattermost/server/v8: upgrade to the fixed version with the command below.

go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260320113102-f2b3d1c6a945

Details

Mattermost has an Incorrect Authorization issue 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

No fixed version published yet for github.com/mattermost/mattermost-server (go modules). Pin to a known-safe version or switch to an alternative.

Go/github.com/mattermost/mattermost-server/v5
Introduced in: 0

No fixed version published yet for github.com/mattermost/mattermost-server/v5 (go modules). Pin to a known-safe version or switch to an alternative.

Go/github.com/mattermost/mattermost-server/v6
Introduced in: 0

No fixed version published yet for github.com/mattermost/mattermost-server/v6 (go modules). Pin to a known-safe version or switch to an alternative.

Go/github.com/mattermost/mattermost/server/v8
Introduced in: 8.0.0-20260304132957-9f2616376582Fixed in: 8.0.0-20260320113102-f2b3d1c6a945
Fixgo get github.com/mattermost/mattermost/server/v8@v8.0.0-20260320113102-f2b3d1c6a945

References