High · published February 11, 2026
⚡ A pesky denial-of-service vulnerability has been discovered in GitLab that allows unauthenticated users to flood the system with GraphQL queries! Imagine a restaurant where customers can order an unlimited number of dishes without paying. If someone decides to keep ordering, the kitchen gets overwhelmed, causing delays for everyone else — that’s what this vulnerability does to GitLab! If exploited, an attacker could cause the server to choke on repeated queries, leading to service downtime, making it impossible for legitimate users to access the platform. This disruption could be absolutely devastating for teams relying on GitLab for collaboration and code management.
Imagine a restaurant where customers can order an unlimited number of dishes without paying. If someone decides to keep ordering, the kitchen gets overwhelmed, causing delays for everyone else — that’s what this vulnerability does to GitLab! This vulnerability allows unauthenticated users to send repeated GraphQL queries, resulting in a denial-of-service condition. It affects versions of GitLab CE/EE from 10.8 up to before 18.6.6, 18.7 up to before 18.7.4, and 18.8 up to before 18.8.4.
If exploited, an attacker could cause the server to choke on repeated queries, leading to service downtime, making it impossible for legitimate users to access the platform. This disruption could be absolutely devastating for teams relying on GitLab for collaboration and code management. Upgrade GitLab to version 18.6.6, 18.7.4, or 18.8.4, depending on which branch you are using. Regularly monitor your GraphQL endpoints to ensure they aren't being abused and consider implementing rate limiting to mitigate such attacks in the future. You've got this! Follow these steps to ensure your GitLab instance is safe and sound. 🛡️