---
cve: "CVE-2026-106016"
severity: "CRITICAL"
cvss: 9.8
epss: "0.3%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-10-06 13:16:47"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-02T00:19:04+01:00"
---

# CVE-2026-106016

> 9.8 CRITICAL

## Beschreibung

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.

## CNA-Record (Kanon, cvelistV5)

- CNA: **mozilla**
- State: PUBLISHED
- Stand: 2026-10-13 18:08:38

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-693** — Protection Mechanism Failure
  The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

## Angriffsmuster (CAPEC)

- [CAPEC-1 — Accessing Functionality Not Properly Constrained by ACLs](https://capec.mitre.org/data/definitions/1.html) _(Severity: High)_
- [CAPEC-17 — Using Malicious Files](https://capec.mitre.org/data/definitions/17.html) _(Severity: Very High)_
- [CAPEC-20 — Encryption Brute Forcing](https://capec.mitre.org/data/definitions/20.html) _(Severity: Low)_
- [CAPEC-22 — Exploiting Trust in Client](https://capec.mitre.org/data/definitions/22.html) _(Severity: High)_
- [CAPEC-36 — Using Unpublished Interfaces or Functionality](https://capec.mitre.org/data/definitions/36.html) _(Severity: High)_
- [CAPEC-107 — Cross Site Tracing](https://capec.mitre.org/data/definitions/107.html) _(Severity: Very High)_
- [CAPEC-127 — Directory Indexing](https://capec.mitre.org/data/definitions/127.html) _(Severity: Medium)_
- [CAPEC-237 — Escaping a Sandbox by Calling Code in Another Language](https://capec.mitre.org/data/definitions/237.html) _(Severity: Very High)_

## ATT&CK-Techniken

- [T1574.010 — Hijack Execution Flow: ServicesFile Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)
- [T1574.005 — Hijack Execution Flow: Executable Installer File Permissions](https://attack.mitre.org/techniques/T1574/005/)
- [T1083 — File and Directory Discovery](https://attack.mitre.org/techniques/T1083/)

## BSI-Hinweise (deutsch)

- [Mozilla Firefox: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3788) — _BSI-Einstufung: mittel_
  Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Mozilla Firefox ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

## Referenzen

- <https://bugzilla.mozilla.org/show_bug.cgi?id=2067465>
- <https://www.mozilla.org/security/advisories/mfsa2026-104/>
- <https://www.mozilla.org/security/advisories/mfsa2026-109/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-106016/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_