CVE-2025-8014 in Community Edition
Summary
by MITRE • 09/27/2025
Denial of Service issue in GraphQL endpoints in Gitlab EE/CE affecting all versions from 11.10 prior to 18.2.7, 18.3 prior to 18.3.3, and 18.4 prior to 18.4.1 allows unauthenticated users to potentially bypass query complexity limits leading to resource exhaustion and service disruption.
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Analysis
by VulDB Data Team • 09/28/2025
The vulnerability identified as CVE-2025-8014 represents a critical denial of service weakness in Gitlab's GraphQL endpoint implementations across both enterprise and community editions. This issue affects a broad range of versions including those from 11.10 through 18.2.6, 18.3 through 18.3.2, and 18.4 through 18.4.0, creating a substantial attack surface for malicious actors targeting Gitlab instances. The flaw specifically resides in the GraphQL query complexity limiting mechanisms that are designed to prevent overly resource-intensive queries from overwhelming the system. When these protective measures are bypassed, unauthenticated users can submit malicious GraphQL queries that consume excessive computational resources, ultimately leading to system resource exhaustion and complete service disruption.
The technical implementation of this vulnerability stems from insufficient validation and enforcement of GraphQL query complexity limits within Gitlab's backend processing layer. The GraphQL endpoint fails to properly enforce rate limiting and complexity calculations that should restrict the computational resources required for query execution. This allows attackers to craft queries that appear benign but contain nested fields or recursive structures that exponentially increase processing time and memory consumption. The vulnerability operates at the application layer and specifically targets the GraphQL engine's ability to analyze and execute queries, making it particularly dangerous as it can be exploited without requiring authentication credentials. According to CWE standards, this maps to CWE-400 which describes "Uncontrolled Resource Consumption" and CWE-310 which addresses "Cryptographic Issues" in the context of insufficient resource management.
The operational impact of CVE-2025-8014 extends far beyond simple service interruption, as it can effectively render entire Gitlab instances unavailable to legitimate users and administrators. Attackers can leverage this vulnerability to perform sustained denial of service attacks that consume CPU cycles and memory resources at an alarming rate, potentially causing cascading failures throughout the system infrastructure. The vulnerability's unauthenticated nature means that any external party can exploit it without prior access credentials, making it particularly dangerous in public-facing Gitlab deployments. This weakness directly violates the availability principle of the CIA triad and can result in significant business disruption, especially for organizations that rely heavily on Gitlab for version control and continuous integration processes. The attack can be executed through standard network requests, making it easily automatable and scalable across multiple targets.
Mitigation strategies for CVE-2025-8014 should prioritize immediate patching of affected Gitlab versions to the latest stable releases that contain the necessary security fixes. Organizations should implement additional network-level protections including rate limiting at the perimeter and monitoring for unusual query patterns that might indicate exploitation attempts. The implementation of GraphQL-specific security controls such as query depth limits, field count restrictions, and execution time thresholds should be enforced at the application level. Network segmentation and access controls should be strengthened to limit exposure of GraphQL endpoints to untrusted networks. Security teams should also implement comprehensive monitoring solutions that can detect and alert on anomalous resource consumption patterns associated with GraphQL query execution. According to ATT&CK framework, this vulnerability aligns with T1499.004 which covers "Endpoint Denial of Service" and T1595.001 which addresses "Network Denial of Service" techniques, making it essential for organizations to maintain robust defensive measures against such attacks. Organizations should also consider implementing automated patch management systems to ensure rapid deployment of security updates across their Gitlab infrastructure.