CVEvulnerability

CVE-2026-95666

4.3 MEDIUM Published 2026-09-22 Modified 2026-10-07 Official page ↗
Status
Analyzed
Published
2026-09-22
Last modified
2026-10-07
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:N/I:N/A:L
Weaknesses
CWE-770

Description

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to limit the length of the post ID array accepted by the bulk reactions endpoint which allows an authenticated user to cause excessive database load via a crafted request to {{POST /api/v4/posts/ids/reactions}}.. Mattermost Advisory ID: MMSA-2026-00771

Affected configurations

• mattermost mattermost server (>= 11.7.0 < 11.7.11) • mattermost mattermost server (>= 11.8.0 < 11.8.6) • mattermost mattermost server (>= 11.9.0 < 11.9.2) • mattermost mattermost server (>= 11.10.0 < 11.10.2)

Related

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References