Vulnerability in Systemd

CVE-2026-40226

In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

EPSS: 0.000 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Systemd — versions 233

Weakness classification (CWE)

CWE-348

References

github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcx

Frequently asked questions

What is CVE-2026-40226?: CVE-2026-40226 is a medium-severity vulnerability in Systemd, classified under CWE-348. CVSS score: 6.4/10. Published 2026-04-10.
How severe is CVE-2026-40226?: Medium severity. CVSS v3 base score is 6.4 out of 10.