CVE-2026-28741

HighCVSS 8.1/10Last modified Jun 17, 2026

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 validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-352

Affected software

VendorProductVersions
MattermostMattermost>= 10.11.0, <= 10.11.12; >= 11.5.0, <= 11.5.0; >= 11.4.0, <= 11.4.2; >= 11.3.0, <= 11.3.2

References

Timeline

Published
Apr 15, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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