CVE-2026-5262

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-04-22 17:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 10:58 UTC Last updatedMost recent change to the record

Details

Published

2026-04-22 17:16 UTC

Last modified

2026-06-17 10:58 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Analyzed

Affected

• GitLab < 18.9.6
• GitLab < 18.10.4
• GitLab 18.11.0

Attack profile CVSS 3.1 · 8.0

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None