CVE-2023-6502 Inefficient Regular Expression Complexity in GitLab

What is CVE-2023-6502?

CVE-2023-6502 is a medium-severity denial of service vulnerability in Gitlab Gitlab, published on 23 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions before 16.10.6, version 16.11 before 16.11.3, and 17.0 before 17.0.1. It is possible for an attacker to cause a denial of service using a crafted wiki page.

Weakness: CWE-1333

Which versions are affected by CVE-2023-6502?

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

Products include Gitlab Gitlab.

How do I fix CVE-2023-6502?

Upgrade gitlab to a fixed version for your release line: 16.10.6, 16.11.3 or 17.0.1.

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-2023-6502 being exploited?

There is no known exploitation of CVE-2023-6502 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-2023-6502, GHSA-9xx7-rp3v-8694, UBUNTU-CVE-2023-6502.