GitLab Community Edition/Enterprise Edition up to 18.9.6/18.10.5/18.11.2 JSON allocation of resources

Summaryinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.9.6/18.10.5/18.11.2. It has been classified as problematic. The affected element is an unknown function of the component JSON Handler. The manipulation leads to allocation of resources. This vulnerability is traded as CVE-2025-14870. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GitLab Community Edition and Enterprise Edition up to 18.9.6/18.10.5/18.11.2. This issue affects an unknown code block of the component JSON Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by sending specially crafted JSON payloads due to insufficient input validation.

The weakness was shared by a92847865. The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2025-14870 since 12/18/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 316318 (Linux Distros Unpatched Vulnerability : CVE-2025-14870), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.9.7, 18.10.6 or 18.11.3 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the databases at Tenable (316318) and EUVD (EUVD-2025-209836). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.9.0
• 18.9.1
• 18.9.2
• 18.9.3
• 18.9.4
• 18.9.5
• 18.9.6
• 18.10.0
• 18.10.1
• 18.10.2
• 18.10.3
• 18.10.4
• 18.10.5
• 18.11.0
• 18.11.1
• 18.11.2

License

• open-source

Website

• Vendor: https://gitlab.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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