---
cve: "CVE-2026-5816"
severity: "HIGH"
cvss: 8.0
epss: "41%"
vendor: "GitLab"
kev: false
exploited: false
published: "2026-04-22 17:16:44"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T23:33:36+02:00"
---

# CVE-2026-5816

> 8.0 HIGH

## Beschreibung

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 2c4a87e00b3f5ab1eab353136020dfcab34ae6ca (Commit)

## Referenzen

- <https://hackerone.com/reports/3572231>
- <https://gitlab.com/gitlab-org/gitlab/-/work_items/592816>
- <https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-5816) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_