CVEvulnerability

CVE-2026-18256

4.3 MEDIUM Published 2026-10-16 Modified 2026-10-29 Official page ↗
Status
Analyzed
Published
2026-10-16
Last modified
2026-10-29
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-863

Description

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 properly restrict private teams from public team search results, which allows an authenticated user without permission to list private teams to disclose the ID, name, and display name of private teams via a modified team search request. Mattermost Advisory ID: MMSA-2026-00748

Affected configurations

• mattermost mattermost server (>= 11.7.0 < 11.7.10) • mattermost mattermost server (>= 11.8.0 < 11.8.6) • mattermost mattermost server (>= 11.9.0 < 11.9.2) • mattermost mattermost server 11.10.0

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References