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Vulnerability record · CVE-2026-82636 · published 30 August 2026

CVE-2026-82636: OS command injection vulnerability

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.

7.9 CVSS 3.1 High EPSS 1.9% · top 20.9% CWE-78 · OS command injection Deferred
7.9CVSS 3.1 base score
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
8 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References

LinkTags
https://news.ycombinator.com/item?id=49496918
https://www.qubes-os.org/news/2026/08/29/qsb-118/

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Source: NIST National Vulnerability Database (record CVE-2026-82636), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.