CVE-2026-3117 | THREATINT

Description

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the {{gitlab instance {option}}} or the {{/gitlab webhook {option}}} commands. Mattermost Advisory ID: MMSA-2026-00600

PUBLISHED Reserved 2026-02-24 | Published 2026-05-18 | Updated 2026-05-18 | Assigner Mattermost

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-862: Missing Authorization

Product status

Default status

unaffected

Any version

affected

Any version

affected

Any version

affected

11.6.0

unaffected

11.5.2

unaffected

10.11.14

unaffected

11.4.4

unaffected

Credits

daw10 finder

References

mattermost.com/security-updates (MMSA-2026-00600) vendor-advisory

cve.org (CVE-2026-3117)

nvd.nist.gov (CVE-2026-3117)

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