GHSA-44mv-jq72-gj49MediumCVSS 4.3

Mattermost fails to bound memory allocation when processing PSD image files

Published
March 16, 2026
Last Modified
March 17, 2026

🔗 CVE IDs covered (1)

CVE-2026-26246 →

📋 Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing PSD image files which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted PSD file. Mattermost Advisory ID: MMSA-2026-00572

🎯 Affected products5

  • go/github.com/mattermost/mattermost/server/v8:< 8.0.0-20260115183946-38b413a27604
  • go/github.com/mattermost/mattermost-server:< 5.3.2-0.20260115183946-38b413a27604
  • go/github.com/mattermost/mattermost-server:>= 10.11.0-rc1, < 10.11.11
  • go/github.com/mattermost/mattermost-server:>= 11.2.0-rc1, < 11.2.3
  • go/github.com/mattermost/mattermost-server:>= 11.3.0-rc1, < 11.3.1

🔗 References (4)