CVE-2026-1069 in Community Edition
Summary
by MITRE • 03/11/2026
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.9.2 that could have allowed an unauthenticated user to cause a denial of service by sending specially crafted GraphQL requests due to uncontrolled recursion under certain circumstances.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 03/14/2026
The vulnerability identified as CVE-2026-1069 represents a critical denial of service weakness in GitLab Community Edition and Enterprise Edition products. This flaw exists in versions ranging from 18.9 through all releases prior to 18.9.2, creating a persistent security gap that could be exploited by malicious actors without requiring authentication credentials. The issue specifically manifests within the GraphQL query processing functionality of the GitLab platform, where improperly constructed requests can trigger unintended system behavior that ultimately results in service disruption.
The technical root cause of this vulnerability stems from uncontrolled recursion within the GraphQL request handling mechanism. When an unauthenticated user submits specially crafted GraphQL queries, the system processes these requests without adequate recursion depth limitations or validation checks. This allows the malicious input to create nested query structures that can recursively call themselves indefinitely, consuming system resources and ultimately causing the GitLab instance to become unresponsive. The vulnerability operates under the CWE-674 principle of uncontrolled recursion, where the system fails to implement proper safeguards against recursive operations that could exhaust computational resources.
The operational impact of CVE-2026-1069 extends beyond simple service interruption to potentially compromise the availability of critical development infrastructure. Organizations relying on GitLab for version control, continuous integration, and collaboration may experience complete service outages when this vulnerability is exploited, affecting developer productivity and potentially disrupting deployment pipelines. The unauthenticated nature of the attack means that any external party can exploit this weakness without requiring legitimate credentials, making it particularly dangerous in publicly accessible environments. This vulnerability directly aligns with attack patterns documented in the MITRE ATT&CK framework under the service stoppage category, where adversaries target availability through resource exhaustion techniques.
Mitigation strategies for this vulnerability primarily focus on immediate remediation through version updates to GitLab 18.9.2 or later releases where the issue has been addressed. Organizations should implement network-level controls to monitor and restrict GraphQL endpoint access, particularly in environments where untrusted users may have network access. Additionally, implementing rate limiting and recursion depth controls at the application level can provide additional protection against similar vulnerabilities. System administrators should also consider implementing intrusion detection systems to monitor for unusual GraphQL query patterns that might indicate exploitation attempts. The remediation process should include thorough testing of the updated GitLab installation to ensure that legitimate functionality remains intact while the vulnerability is eliminated. Organizations that cannot immediately upgrade should consider implementing temporary network segmentation or access controls to limit exposure to this specific threat vector.