---
cve: "CVE-2026-44709"
severity: "HIGH"
cvss: 7.8
epss: "15%"
vendor: "mcdope"
kev: false
exploited: false
published: "2026-05-27 21:16:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T08:38:51+02:00"
---

# CVE-2026-44709

> 7.8 HIGH · 🧪 PoC

## Beschreibung

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, pamusb-pinentry reads the PINENTRY_FALLBACK_APP environment variable and executes it directly without any validation. Any process that can set environment variables before pamusb-pinentry is invoked can point PINENTRY_FALLBACK_APP at an arbitrary binary or script and have it executed with the privileges of the pam_usb tool chain. This vulnerability is fixed in 0.8.7.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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 | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 987f4f6ddf0a8c75ddd5f05b19b863220efe9005 (Commit)

## Referenzen

- <https://github.com/mcdope/pam_usb/security/advisories/GHSA-jxrj-q67x-wr4c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44709) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_