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CVE-2026-5262

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

Published: Apr 22, 2026Updated: Apr 22, 2026 Sources: CVE List NVD
NVD MITRE
8.0CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None

Weaknesses

CWE-79

Affected Products

GitLab
GitLab

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Apr 22, 2026
Last Updated
Apr 22, 2026

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