Vulnerabilities CVE-2026-10106

CVE-2026-10106

Medium

Open

TLP:CLEAR

Unauthorized users can trigger interactive post actions in private channels via action cookie channel mismatch in Mattermost

NVD CVE.org

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Description

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that the channel referenced in an action cookie matches the channel of the target post, which allows an authenticated user without access to a private channel to trigger interactive post actions on posts in that channel via a cookie obtained from any accessible channel.. Mattermost Advisory ID: MMSA-2026-00690

Details

CVSS Score: 6.5
EPSS Score ⓘ: 0.18%

7.1th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Confidence: 90%
Published: Jul 13, 2026
Last Modified: Jul 13, 2026

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