---
cve: "CVE-2026-9891"
severity: "CRITICAL"
cvss: 9.0
epss: "25%"
vendor: "Google"
kev: false
exploited: false
published: "2026-05-28 23:16:47"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T02:54:41+02:00"
---

# CVE-2026-9891

> 9.0 CRITICAL

## Beschreibung

Use after free in Extensions in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)

## CVSS-Vektor

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

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

## Referenzen

- <https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html>
- <https://issues.chromium.org/issues/513508128>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-9891) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_