CVE-2023-0756 Code injection in GitLab

Medium 4.8 Published 3 May 2023 Updated 12 Feb 2025

Attackers can create repositories with malicious code via crafted branch names, leading to arbitrary code execution when victims clone or download them.

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-2023-0756?

CVE-2023-0756 is a medium-severity code injection vulnerability in Gitlab Gitlab, published on 3 May 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

An issue has been discovered in GitLab affecting all versions before 15.9.6, all versions starting from 15.10 before 15.10.5, all versions starting from 15.11 before 15.11.1. The main branch of a repository with a specially crafted name allows an attacker to create repositories with malicious code, victims who clone or download these repositories will execute arbitrary code on their systems.

Which versions are affected by CVE-2023-0756?

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

Package	Affected	Fixed in
`gitlab` Bitnami	All versions	`15.9.6, 15.10.5, 15.11.1`

Products include Gitlab Gitlab.

How do I fix CVE-2023-0756?

Upgrade gitlab to a fixed version for your release line: 15.9.6, 15.10.5 or 15.11.1.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-0756 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0756 exists.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2023-0756, GHSA-7g4m-989q-fjvm, UBUNTU-CVE-2023-0756.