What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-29 · updated 2026-08-03
• Weakness: CWE-79

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.

Affected products

• GitLab: from 14.0.0 before 19.0.5; from 19.1.0 before 19.1.3; 19.2.0 — fixed in 19.0.5, 19.1.3

How to fix

Upgrade to a fixed version: GitLab 19.0.5, 19.1.3. Check the vendor advisory for mitigations.

References

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/591274
• https://hackerone.com/reports/3539833

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