CVE-2026-3254

LOW SEVERITY

CVSS Score & Metrics

Base Score

3.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N                                    

Vulnerability Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox.

Vulnerability Details

Published Date

April 22, 2026

Last Modified

April 23, 2026

CWE ID

CWE-1021

Source

NVD

Vendor

gitlab

Product

gitlab

External References

https://gitlab.com/gitlab-org/gitlab/-/work_items/591587
https://hackerone.com/reports/3572752

CVE-2026-3254

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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