CVE-2020-26411 Denial of service in GitLab

What is CVE-2020-26411?

CVE-2020-26411 is a medium-severity denial of service vulnerability in Gitlab Gitlab, published on 11 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A potential DOS vulnerability was discovered in all versions of Gitlab starting from 13.4.x (>=13.4 to <13.4.7, >=13.5 to <13.5.5, and >=13.6 to <13.6.2). Using a specific query name for a project search can cause statement timeouts that can lead to a potential DOS if abused.

Weakness: CWE-404

Which versions are affected by CVE-2020-26411?

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

Products include Gitlab Gitlab.

How do I fix CVE-2020-26411?

Upgrade gitlab to a fixed version for your release line: 13.4.7, 13.5.5 or 13.6.2.

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-2020-26411 being exploited?

There is no known exploitation of CVE-2020-26411 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-2020-26411, GHSA-2qvv-wf53-7c44, UBUNTU-CVE-2020-26411.