CVE-2026-10542

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CVSS 3.1

5.0 medium

EPSS

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Published

Sep 14, 2026 (1d ago)

Modified

Sep 14, 2026

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to validate channel action ownership which allows channel managers to update actions in other channels via the channel action update endpoint.. Mattermost Advisory ID: MMSA-2026-00692

Weakness: CWE-639
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

NVD CVE.org GitHub PoCs EPSS (—)

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