Impact
GitLab CE and Enterprise Edition contain a flaw that allows an authenticated user to send specially crafted GraphQL queries that consume excessive system resources, potentially leading to a denial of service. The weakness is identified as CWE-770, which highlights the lack of resource allocation limits.
Affected Systems
All GitLab installations from version 12.4 through 18.9.5, 18.10.x before 18.10.4, and 18.11.x before 18.11.1 are vulnerable. The vendor recommends upgrading to 18.9.6, 18.10.4, 18.11.1 or any later release to mitigate the issue.
Risk and Exploitability
With a CVSS score of 6.5, the vulnerability poses a moderate risk. The EPSS score is not available and the vulnerability has not been listed in the CISA KEV catalog. Exploitation requires an authenticated user with access to the GraphQL API, and the attacker can trigger resource exhaustion that may bring the GitLab instance or hosting server offline.
OpenCVE Enrichment