---
cve: "CVE-2026-87766"
severity: "HIGH"
cvss: 8.8
epss: "0.1%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-09 09:17:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T12:20:28+02:00"
---

# CVE-2026-87766

> 8.8 HIGH · 🧪 PoC

## Beschreibung

A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| 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 |

## Patch verfügbar (OSV)

- 2a76602a8c71f36c1527cf9fc3417d9149822e0c (Commit)

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-87766>
- <https://bugs.debian.org/1145655>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2530542>
- <https://github.com/containers/bubblewrap/releases/tag/v0.12.0>
- <https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx>
- <https://www.openwall.com/lists/oss-security/2026/08/27/7>
- <http://www.openwall.com/lists/oss-security/2026/09/09/3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-87766) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_