CVE-2021-22168 Denial of service in GitLab
An attacker can cause a denial of service in GitLab's NuGet API via a regular expression denial of service attack.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-22168?
CVE-2021-22168 is a medium-severity denial of service vulnerability in Gitlab Gitlab, published on 15 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A regular expression denial of service issue has been discovered in NuGet API affecting all versions of GitLab starting from version 12.8.
Weakness: CWE-400
Which versions are affected by CVE-2021-22168?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 12.8.0 | 13.5.6, 13.6.4, 13.7.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2021-22168?
Upgrade gitlab to a fixed version for your release line: 13.5.6, 13.6.4 or 13.7.2.
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-2021-22168 being exploited?
There is no known exploitation of CVE-2021-22168 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
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as BIT-gitlab-2021-22168, GHSA-7w6h-978p-xvrg, UBUNTU-CVE-2021-22168.