---
cve: "CVE-2026-86320"
severity: "HIGH"
cvss: 7.8
epss: "24.6%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-17 08:17:02"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T07:48:43+02:00"
---

# CVE-2026-86320

> 7.8 HIGH

## Beschreibung

A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary code execution with the privileges of the user running flatpak-builder.

## CVSS-Vektor

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

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

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-86320>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2471023>
- <https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-86320) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_