CVE-2026-3093 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Medium 4.7 Published 29 Jul 2026 Updated 29 Jul 2026

An attacker can execute arbitrary JavaScript in another user's browser via a crafted URL due to improper input sanitization in GitLab.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-3093?

CVE-2026-3093 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.

Weakness: CWE-79

Which versions are affected by CVE-2026-3093?

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

Package	Affected	Fixed in
`gitlab` Bitnami	From `14.0.0`	`19.0.5, 19.1.3, 19.2.1`

Products include Gitlab Gitlab.

How do I fix CVE-2026-3093?

Upgrade gitlab to a fixed version for your release line: 19.0.5, 19.1.3 or 19.2.1.

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-2026-3093 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3093 exists.

All Gitlab Gitlab vulnerabilities

Sources

Also known as BIT-gitlab-2026-3093, GHSA-2rc9-8cx9-fxpr, MINI-6x2g-rvqx-g8x4, MINI-hj3j-27x2-rw97.