🔐 CVE Alert

CVE-2026-5262

HIGH 8.0

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

CVSS Score
8.0
EPSS Score
0.0%
EPSS Percentile
0th

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.1.0 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an unauthenticated user to access tokens in the Storybook development environment due to improper input validation.

CWE CWE-79
Vendor gitlab
Product gitlab
Ecosystems
Industries
Technology
Published Apr 22, 2026
Last Updated Apr 22, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Affected Versions

GitLab / GitLab
16.1.0 < 18.9.6 18.10 < 18.10.4 18.11 < 18.11.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗
gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/work_items/595332 hackerone.com: https://hackerone.com/reports/3574642 about.gitlab.com: https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/

Credits

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program