# CVE-2026-2973: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

> CVE-2026-2973: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-2973
Last updated: 2026-06-17T10:32:08Z

- Published: 2026-03-25 16:34 UTC · Updated: 2026-06-17 10:32 UTC · Assigner: GitLab
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS: 0.18%, 7th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.

## Affected vendors and products

- GitLab: GitLab

## Tracked companies

- [GitLab](https://rewindex.com/company/gitlab.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-2973)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-2973)
- [https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/](https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/)
- [https://gitlab.com/gitlab-org/gitlab/-/work\_items/591049](https://gitlab.com/gitlab-org/gitlab/-/work_items/591049)
- [https://hackerone.com/reports/3566802](https://hackerone.com/reports/3566802)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-2973 · Markdown: https://rewindex.com/cve/CVE-2026-2973.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-2973 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:51:43.781Z