GitLab Community Edition/Enterprise Edition up to 18.7.4/18.8.4/18.9.0 Jira Events Endpoint allocation of resources

Summaryinfo

A vulnerability described as problematic has been identified in GitLab Community Edition and Enterprise Edition up to 18.7.4/18.8.4/18.9.0. This impacts an unknown function of the component Jira Events Endpoint. Executing a manipulation can lead to allocation of resources. The identification of this vulnerability is CVE-2026-1662. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.7.4/18.8.4/18.9.0. It has been declared as problematic. This vulnerability affects an unknown code block of the component Jira Events Endpoint. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause Denial of Service by sending specially crafted requests to the Jira events endpoint.

The weakness was shared by A92847865 as 588206. The advisory is shared for download at gitlab.com. This vulnerability was named CVE-2026-1662 since 01/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 300129 (Linux Distros Unpatched Vulnerability : CVE-2026-1662), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.7.5, 18.8.5 or 18.9.1 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the vulnerability database at Tenable (300129). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.0
• 18.1
• 18.2
• 18.3
• 18.4
• 18.5
• 18.6
• 18.7
• 18.7.0
• 18.7.1
• 18.7.2
• 18.7.3
• 18.7.4
• 18.8
• 18.8.0
• 18.8.1
• 18.8.2
• 18.8.3
• 18.8.4
• 18.9.0

License

• open-source

Website

• Vendor: https://gitlab.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion