CVE-2026-5262: Cross-site Scripting issue in Storybook impacts GitLab CE/EE

Published Apr 22, 2026
·
Updated

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.

Other sources

GitLab has remediated an issue that under certain conditions could have allowed an unauthenticated user to access tokens in the Storybook development environment due to improper input validation.

— GitLab

Affected Software

8 affected componentsFixes available
GitLab GitLab CE/EE>=16.1.0<18.9.6, >=18.10.0<18.10.4, >=18.11.0<18.11.1
GitLab GitLab>=16.1<18.9.6, >=18.10<18.10.4, >=18.11<18.11.1
18.9.618.10.418.11.1
GitLab GitLab>=16.1.0<18.9.6
GitLab GitLab>=16.1.0<18.9.6
GitLab GitLab>=18.10.0<18.10.4
GitLab GitLab>=18.10.0<18.10.4
GitLab GitLab=18.11.0
GitLab GitLab=18.11.0

Remediation

Information

Upgrade to versions 18.9.6, 18.10.4, 18.11.1 or above.

Event History

Apr 22, 2026
CVE Published
via MITRE·04:04 PM
Data Sourced
via MITRE·04:04 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·05:16 PM
DescriptionSeverityWeaknessAffected Software
Apr 23, 2026
Data Sourced
via GitLab·07:50 AM
DescriptionSeverityAffected Software
Feb 13, 58282
Event
via FIRST·02:19 PM

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-5262?

CVE-2026-5262 is classified as a moderate severity cross-site scripting vulnerability.

2

How do I fix CVE-2026-5262?

To remediate CVE-2026-5262, upgrade to GitLab versions 18.9.6, 18.10.4, or 18.11.1.

3

Which versions of GitLab are affected by CVE-2026-5262?

CVE-2026-5262 affects GitLab versions from 16.1.0 to before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1.

4

Can CVE-2026-5262 be exploited by authenticated users?

CVE-2026-5262 can be exploited by unauthenticated users under certain conditions.

5

What type of vulnerability is CVE-2026-5262?

CVE-2026-5262 is identified as a cross-site scripting issue in Storybook that targets GitLab CE/EE.

Company

Resources

Contact

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