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CVE-2026-15754

—
CVSS 3.1
4.2 medium
EPSS
<1%p4
Published
()
Modified
Description

Mattermost versions 11.7.x <= 11.7.6, 11.8.x <= 11.8.3 The access control policy unassign endpoint fails to re-validate that each target channel still belongs to the requesting admin's team, which allows an authenticated team administrator to remove ABAC (attribute-based access control) policy assignments from channels outside their team via the policy unassign API after a channel has been moved to another team.. Mattermost Advisory ID: MMSA-2026-00718

Vendors
mattermost
Products
mattermost server
Weakness
CWE-863
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N
NVD CVE.org GitHub PoCs EPSS (0.1%)

In the news

No ingested article mentions this CVE yet.