---
cve: "CVE-2026-87719"
severity: "CRITICAL"
cvss: 9.9
epss: "0.6%"
vendor: "GitLab"
kev: false
exploited: false
published: "2026-09-12 03:16:31"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:30:37+02:00"
---

# CVE-2026-87719

> 9.9 CRITICAL

## Beschreibung

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.

## CVSS-Vektor

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

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

## Referenzen

- <https://gitlab.com/gitlab-org/gitlab/-/work_items/628160>
- <https://hackerone.com/reports/4012289>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-87719) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_