CVE-2020-26407 Cross-site scripting in Gitlab CE/EE
An attacker can execute arbitrary scripts in other users' browsers by importing a malicious project into GitLab.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-26407?
CVE-2020-26407 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 10 Dec 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A XSS vulnerability exists in Gitlab CE/EE from 12.4 before 13.4.7, 13.5 before 13.5.5, and 13.6 before 13.6.2 that allows an attacker to perform cross-site scripting to other users via importing a malicious project
Weakness: CWE-79
Which versions are affected by CVE-2020-26407?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | All versions | 13.6.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-26407?
Upgrade gitlab to 13.6.2 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-26407 being exploited?
There is no known exploitation of CVE-2020-26407 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-2020-26407, GHSA-79rf-9vhj-jq9w, UBUNTU-CVE-2020-26407.