Sanitize team member data returned by API_CVE-2026-3636

4.3 / 10

MEDIUM

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

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

Basic Information

ID CVE-2026-3636

Source Mattermost

Published May 22, 2026 at 10:23

Modified May 22, 2026 at 12:13

Affected Product

Vendor Mattermost

Product Mattermost

Version 11.6.0

Affected Versions Mattermost Mattermost 11.6.0
Mattermost Mattermost 11.5.0
Mattermost Mattermost 11.4.0
Mattermost Mattermost 10.11.0

CWE Classification

CWE-200

References

mattermost.com /security-updates

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    "published": "2026-05-22T10:23:20.485Z",
    "modified": "2026-05-22T12:13:43.868Z",
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