What is CVE-2026-82636?

CVE-2026-82636 is a high-severity vulnerability in Qubes OS, classified under OS Command Injection. CVSS score: 7.9/10. Published 2026-08-30.

How severe is CVE-2026-82636?

High severity. CVSS v3 base score is 7.9 out of 10.

RCE in Qubes OS

CVE-2026-82636

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.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Qubes Os

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-82636?: CVE-2026-82636 is a high-severity vulnerability in Qubes OS, classified under OS Command Injection. CVSS score: 7.9/10. Published 2026-08-30.
How severe is CVE-2026-82636?: High severity. CVSS v3 base score is 7.9 out of 10.