GitLab Enterprise Edition up to 18.8.8/18.9.4/18.10.2 code injection

Summaryinfo

A vulnerability was found in GitLab Enterprise Edition up to 18.8.8/18.9.4/18.10.2. It has been declared as critical. This affects an unknown function. Such manipulation leads to code injection. This vulnerability is traded as CVE-2026-1516. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GitLab Enterprise Edition up to 18.8.8/18.9.4/18.10.2. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

GitLab has remediated an issue in GitLab EE affecting all versions from 18.0.0 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that in Code Quality reports could have allowed an authenticated user to leak IP addresses of users viewing the report via specially crafted content.

The weakness was shared by Maksyche. The advisory is available at hackerone.com. This vulnerability is handled as CVE-2026-1516 since 01/28/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 305635 (GitLab 18.0.0 < 18.8.9 / 18.9 < 18.9.5 / 18.10 < 18.10.3 (CVE-2026-1516)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.8.9, 18.9.5 or 18.10.3 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the vulnerability database at Tenable (305635). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Enterprise Edition

Version

• 18.8.0
• 18.8.1
• 18.8.2
• 18.8.3
• 18.8.4
• 18.8.5
• 18.8.6
• 18.8.7
• 18.8.8
• 18.9.0
• 18.9.1
• 18.9.2
• 18.9.3
• 18.9.4
• 18.10.0
• 18.10.1
• 18.10.2

License

• commercial

Website

• Vendor: https://gitlab.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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