# CVE-2026-3254

> Vulnerability · severity: **LOW** (CVSS 3.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-3254
- **Published:** 2026-04-22
- **CVSS severity:** LOW
- **CVSS base score:** 3.5
- **CWE codes:** CWE-1021

## Affected products

- `gitlab:gitlab`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3254

## Citation

> AI Analytics. CVE-2026-3254. Retrieved 2026-07-16 from https://api.ai-analytics.org/cve/CVE-2026-3254. Derived from NIST NVD. Licensed CC0.

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