Home→Vulnerabilities→CVE-2026-6335
Disclosed

CVE-2026-6335

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.

Share this vulnerability:

Exploitation Probability (EPSS)

Low Priority
0.03%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

2 events
May 14, 2026
Vulnerability Disclosed
Published to component-level vulnerability database.
May 15, 2026
Last Updated
Record updated with new analysis or tags.

Threat Actor Attribution

PREMIUM INTEL
Associated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

Affected Products

1 Total
gitlab/gitlabAll Versions

References

https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/Gitlab
Release Notes
https://gitlab.com/gitlab-org/gitlab/-/work_items/596760Gitlab
Broken Link
https://hackerone.com/reports/3673647Hackerone
Permissions Required

Am I Vulnerable?

Check your domain or package.json for CVE-2026-6335 exposure.

Share This Page

Help others discover this vulnerability information

Vulnerability Details

CVSS Base Score
5.4/ 10
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Published Date
May 14, 2026
Last Modified
May 15, 2026
Need API Access?

Integrate this data into your SOAR platform.

View Plans →
Need Manual Validation?

Automated scanners flag false positives. Get a manual pentest validation for this CVE.