PT-2026-115511 · Mattermost · Mattermost

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CVE-2026-18795

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Published

2026-10-16

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Updated

2026-10-16

CVSS v3.1

6.4

Medium

VectorAV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to enforce DM/GM check on server side which allows an authenticated user to quarantine a post belonging to DM or GM via direct API call.. Mattermost Advisory ID: MMSA-2026-00756

Fix

Missing Authorization

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Weakness Enumeration

Related Identifiers

CVE-2026-18795

Affected Products

Mattermost