CVEvulnerability

CVE-2026-3590

6.5 MEDIUM Published 2026-04-15 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-367

Description

Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.13) • mattermost mattermost server (>= 11.3.0 < 11.3.3) • mattermost mattermost server (>= 11.4.0 < 11.4.3) • mattermost mattermost server (>= 11.5.0 < 11.5.1)

Related

Weakness · CWE (1)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness

References