# CVE-2026-6335: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

> CVE-2026-6335: 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-2026-6335
Last updated: 2026-06-17T11:00:40Z

- Published: 2026-05-14 05:33 UTC · Updated: 2026-06-17 11:00 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: 0.19%, 9th 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 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.

## 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-2026-6335)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-6335)
- [https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/](https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/)
- [https://gitlab.com/gitlab-org/gitlab/-/work\_items/596760](https://gitlab.com/gitlab-org/gitlab/-/work_items/596760)
- [https://hackerone.com/reports/3673647](https://hackerone.com/reports/3673647)

---

_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/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-6335 · Markdown: https://rewindex.com/cve/CVE-2026-6335.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-6335 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:47.886Z