CVE-2026-3254
Low
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.
SeverityLow
CVSS3.5
Exploit probability—
Product
Gitlab
PublishedApr 22, 2026
First seenApr 22, 2026
Weakness typeCWE-1021CWE-1021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 18.11.0 | — |
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