CVE-2026-28741

Summary

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

Affected Software

VendorProductVersion RangeStatus
MattermostMattermost10.11.0 <= 10.11.12affected
MattermostMattermost11.5.0 <= 11.5.0affected
MattermostMattermost11.4.0 <= 11.4.2affected
MattermostMattermost11.3.0 <= 11.3.2affected
MattermostMattermost10.11.13unaffected
MattermostMattermost11.5.1unaffected
MattermostMattermost11.4.3unaffected
MattermostMattermost11.3.3unaffected

Weaknesses

  • CWE-352: CWE-352: Cross-Site Request Forgery (CSRF)

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References