Vulnerabilities CVE-2026-3636

CVE-2026-3636

Medium

Open

TLP:CLEAR

Sanitize team member data returned by API

NVD CVE.org

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Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to sanitize team member data when returned via API to users without elevated permissions which allows a user without permissions to get data about team members roles via invoking various team API endpoints.. Mattermost Advisory ID: MMSA-2026-00626

Details

CVSS Score: 4.3
EPSS Score ⓘ: 0.18%

8.3th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Confidence: 90%
Published: May 22, 2026
Last Modified: May 22, 2026

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