CVE-2026-15754mediumCWE-863

Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 4.2epss 0.1%

probabilidad de explotación

0.1%top 95% de las CVE

explotación observada

noninguna fuente lo reporta

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

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N

Productos afectados

Mattermost · Mattermost

Referencias

https://mattermost.com/security-updates