CVE-2026-3093

Analyzed Analyzed - Analysis Complete

Cross-Site Scripting in GitLab CE/EE

Publication date: 2026-07-29

Last updated on: 2026-08-03

Assigner: GitLab Inc.

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-29

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-3093

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	19.2.0
gitlab	gitlab	19.2.0
gitlab	gitlab	From 14.0.0 (inc) to 19.0.5 (exc)
gitlab	gitlab	From 14.0.0 (inc) to 19.0.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab CE/EE versions 14.0 to 19.0.4, 19.1.0 to 19.1.2, and 19.2.0 allows an attacker to inject arbitrary JavaScript into a victim's browser via a specially crafted URL. This occurs due to improper sanitization of user-controlled input, enabling cross-site scripting (XSS) attacks.

Detection Guidance

This vulnerability involves improper sanitization of user-controlled input in GitLab versions before 19.0.5, 19.1.3, and 19.2.1. To detect it, check your GitLab version using commands like 'gitlab-rake gitlab:env:info' or 'cat /opt/gitlab/version-manifest.txt'. If your version is below the patched releases, the system is vulnerable.

Impact Analysis

An attacker could exploit this to steal session cookies, perform actions on your behalf, or redirect you to malicious sites. This may lead to unauthorized access to sensitive data or account compromise if you interact with the crafted URL.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's security requirements. Organizations may face compliance penalties if user data is compromised through such attacks.

Mitigation Strategies

Upgrade GitLab CE/EE to version 19.0.5, 19.1.3, or 19.2.1 or later to address the improper input sanitization issue.

Hi! I’m here to help you understand CVE-2026-3093. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70