CVE-2026-1456

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through CPU exhaustion by submitting specially crafted markdown files that trigger exponential processing in markdown preview.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*

History

17 Jun 2026, 10:15

Type Values Removed Values Added
Summary
  • (es) GitLab ha remediado un problema en GitLab CE/EE que afectaba a todas las versiones desde la 18.7 hasta las anteriores a la 18.7.4, y desde la 18.8 hasta las anteriores a la 18.8.4, que podría haber permitido a un usuario no autenticado causar denegación de servicio mediante el agotamiento de la CPU al enviar archivos markdown especialmente diseñados que desencadenan un procesamiento exponencial en la vista previa de markdown.

12 Feb 2026, 21:39

Type Values Removed Values Added
CPE cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
First Time Gitlab
Gitlab gitlab
References () https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/ - () https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/ - Release Notes, Vendor Advisory
References () https://gitlab.com/gitlab-org/gitlab/-/issues/587688 - () https://gitlab.com/gitlab-org/gitlab/-/issues/587688 - Broken Link, Issue Tracking
References () https://hackerone.com/reports/3517928 - () https://hackerone.com/reports/3517928 - Permissions Required

11 Feb 2026, 12:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-02-11 12:16

Updated : 2026-06-17 10:15


NVD link : CVE-2026-1456

Mitre link : CVE-2026-1456

CVE.ORG link : CVE-2026-1456


JSON object : View

Products Affected

gitlab

  • gitlab
CWE
CWE-770

Allocation of Resources Without Limits or Throttling