CVE-2026-40226

MEDIUM

systemd nspawn Escape-to-Host via Crafted Config File

Generated titleSource: EIP title enrichment
STIX 2.1 vulnerability

Record summary

CVE-2026-40226 has a selected CVSS score of 6.4 (medium).

Description

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

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationPoC
AutomatableNo
Technical impactTotal

CISA Coordinator · SSVC 2.0.3 · Evaluated Apr 14, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

systemd

Browse systemd / systemd

Default status: unaffected

CVE List233 to < 260affected

References

2