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GHSA-6cfr-wp44-6qmv

Mattermost has an Incorrect Authorization issue

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-4055

Packages

EcosystemPackageAffectedFixed in
Go github.com/mattermost/mattermost/server/v8 >= 8.0.0-20260304132957-9f2616376582, < 8.0.0-20260320113102-f2b3d1c6a945 8.0.0-20260320113102-f2b3d1c6a945

Details

As written in the advisory (Markdown source, shown as plain text).

Mattermost versions 11.5.x <= 11.5.1 fail to validate team-level run_create permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request. Mattermost Advisory ID: MMSA-2026-00629.

References

External links from the advisory. They lead to third-party sites.