---
cve: "CVE-2026-96281"
severity: "MEDIUM"
cvss: 6.2
epss: "0.2%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-27 21:17:04"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-05T05:18:37+02:00"
---

# CVE-2026-96281

> 6.2 MEDIUM · 🧪 PoC

## Beschreibung

On a multi-user system, a user with an active local login session could downgrade a system-wide Flatpak app to an older version by removing the app's remote ref via the unprivileged system-helper RemoveLocalRef method, causing the anti-downgrade check to fail to find a reference date. A malicious local user could use this to expose other users of the same system to an app version with unfixed vulnerabilities.

## CNA-Record (Kanon, cvelistV5)

- CNA: **redhat**
- State: PUBLISHED
- Stand: 2026-09-30 20:11:12
- CNA-CVSS: **6.2** (`CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Physisch | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| 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-2026-96281>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2539421>
- <https://github.com/flatpak/flatpak/security/advisories/GHSA-q4gr-vc25-57m5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-96281) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_