---
id: CVE-2026-82636
title: >-
  Qubes OS before qubes-core-dom0-linux 4.3.22 allows OS command injection
  during a qvm-copy-to-vm call from dom0 to an attacker-controlled qube, because
  the "system" library function is used to process an error message that may
  have shell…
summary: >-
  Qubes OS before qubes-core-dom0-linux 4.3.22 allows OS command injection
  during a qvm-copy-to-vm call from dom0 to an attacker-controlled qube, because
  the "system" library function is used to process an error message that may
  have shell…
severity: high
cvss: 7.9
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-78
published: '2026-08-30'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:42:20.313'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82636'
references:
  - url: 'https://news.ycombinator.com/item?id=49496918'
    label: cve@mitre.org
  - url: 'https://www.qubes-os.org/news/2026/08/29/qsb-118/'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.01922
epssPercentile: 0.79057
ingestedAt: '2026-08-30T23:59:27.963Z'
---

## Overview

Qubes OS before qubes-core-dom0-linux 4.3.22 allows OS command injection during a qvm-copy-to-vm call from dom0 to an attacker-controlled qube, because the "system" library function is used to process an error message that may have shell metacharacters. This occurs in core-admin-linux/file-copy-vm/qfile-dom0-agent.c.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.