REDHAT-BUG-2428222: High severity GitLab GitLab Community Edition vulnerability

Published Jan 9, 2026
·
Updated

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.2 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an authenticated user to achieve stored cross-site scripting by exploiting GitLab Flavored Markdown.

Affected Software

6 affected components
GitLab GitLab Community Edition>=18.2.2<18.5.5
GitLab GitLab Enterprise Edition>=18.2.2<18.5.5
GitLab GitLab Community Edition<18.6.3, >=18.5.5<18.6.3
GitLab GitLab Enterprise Edition<18.6.3, >=18.5.5<18.6.3
GitLab GitLab Community Edition<18.7.1, >=18.6.3<18.7.1
GitLab GitLab Enterprise Edition<18.7.1, >=18.6.3<18.7.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade GitLab CE/EE to a version that resolves this vulnerability.

    Fixed in 18.5.5
  2. Upgrade

    Upgrade GitLab CE/EE to a version that resolves this vulnerability.

    Fixed in 18.6.3
  3. Upgrade

    Upgrade GitLab CE/EE to a version that resolves this vulnerability.

    Fixed in 18.7.1

Event History

Jan 9, 2026
Data Sourced
via Red Hat·10:25 AM
DescriptionSeverityAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2428222?

The severity of REDHAT-BUG-2428222 is classified as high with a score of 7.

2

How do I fix REDHAT-BUG-2428222?

To fix REDHAT-BUG-2428222, upgrade to GitLab versions 18.5.5, 18.6.3, or 18.7.1 or later.

3

What vulnerability does REDHAT-BUG-2428222 address?

REDHAT-BUG-2428222 addresses a stored cross-site scripting vulnerability in GitLab Flavored Markdown.

4

Which versions of GitLab are affected by REDHAT-BUG-2428222?

GitLab CE/EE versions from 18.2.2 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 are affected.

5

Who can exploit the vulnerability identified in REDHAT-BUG-2428222?

An authenticated user can exploit the vulnerability identified in REDHAT-BUG-2428222.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203