CVE-2023-0921 Allocation of Resources Without Limits or Throttling in GitLab

What is CVE-2023-0921?

CVE-2023-0921 is a medium-severity denial of service vulnerability in Gitlab Gitlab, published on 6 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A lack of length validation in GitLab CE/EE affecting all versions from 8.3 before 15.10.8, 15.11 before 15.11.7, and 16.0 before 16.0.2 allows an authenticated attacker to create a large Issue description via GraphQL which, when repeatedly requested, saturates CPU usage.

Weakness: CWE-770

Which versions are affected by CVE-2023-0921?

1 open source package ship an affected version, including gitlab. It affects 1 product.

Products include Gitlab Gitlab.

How do I fix CVE-2023-0921?

Upgrade gitlab to a fixed version for your release line: 15.10.8, 15.11.7 or 16.0.2.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-0921 being exploited?

There is no known exploitation of CVE-2023-0921 in the wild and no public exploit code.

Other vulnerabilities in Gitlab Gitlab

• CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound Exploited Critical 10.0
• CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal Exploited Critical 10.0
• CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control Exploited Critical 10.0
• CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution Exploited Critical 10.0
• CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Exploited Medium 6.8

All Gitlab Gitlab vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-gitlab-2023-0921, GHSA-p96p-59v7-xxp6, UBUNTU-CVE-2023-0921.