CVE-2026-40226

Name: CVE-2026-40226
Creator: NVD / NIST
Published: 2026-04-10T16:16:33.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.4/10EPSS 0.07%

Last modified Jun 17, 2026

CVE-2026-40226 is a medium-severity vulnerability rated 6.4/10 on the CVSS scale. In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.. EPSS estimates a 0.07% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.4/10

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

EPSS Probability

0.07%

0.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-348

Affected Software

Vendor	Product	Versions
Systemd Project	Systemd	>= 233, < 257.12
Systemd Project	Systemd	>= 258, < 258.6
Systemd Project	Systemd	>= 259, < 259.4

References

https://github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcxVendor Advisory

Timeline

Published: Apr 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is 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.

How severe is CVE-2026-40226?

CVE-2026-40226 has a CVSS score of 6.4/10 (MEDIUM severity). The EPSS model estimates a 0.07% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40226?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40226?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST