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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/	Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/587688	Broken Link Issue Tracking
https://hackerone.com/reports/3517928	Permissions Required

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

12 Feb 2026, 21:39

Type	Values Removed	Values Added
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
CPE		cpe:2.3:a:gitlab:gitlab:::::enterprise:::* cpe:2.3:a:gitlab:gitlab:::::community:::*
First Time		Gitlab Gitlab gitlab

11 Feb 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-11 12:16

Updated : 2026-02-12 21:39

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

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