CVE-2020-26414 Denial of service in GitLab
Attackers can cause denial of service in GitLab by submitting malicious input that triggers quadratic regex execution time.
- 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-2020-26414?
CVE-2020-26414 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
An issue has been discovered in GitLab affecting all versions starting from 12.4. The regex used for package names is written in a way that makes execution time have quadratic growth based on the length of the malicious input string.
Which versions are affected by CVE-2020-26414?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 12.4.0 | 13.5.6, 13.6.4, 13.7.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-26414?
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-2020-26414 being exploited?
There is no known exploitation of CVE-2020-26414 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-2020-26414, GHSA-hwx9-j325-fw69, UBUNTU-CVE-2020-26414.