CVE-2026-82636 Command injection in Qubes OS
An attacker can execute arbitrary OS commands in dom0 via a crafted error message during a file copy operation from a compromised qube.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82636?
CVE-2026-82636 is a high-severity command injection vulnerability in Qubes OS, published on 30 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-82636?
How do I fix CVE-2026-82636?
No fix has been published for CVE-2026-82636 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-82636 being exploited?
There is no known exploitation of CVE-2026-82636 in the wild and no public exploit code.
Sources
Also known as GHSA-ppf9-cgjm-478m.