CVE-2026-4055MEDIUMCVSS 4.3

Mattermost has an Incorrect Authorization issue

Published May 21, 2026·Updated Jun 23, 2026

Description

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.

Affected Packages (1)

github.com/mattermost/mattermost/server/v8GO
From 8.0.0-20260304132957-9f2616376582
Fixed in 8.0.0-20260320113102-f2b3d1c6a945

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

View on NVD Search GitHub Search Google

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