CVE-2026-40226
CVE-2026-40226 is a medium-severity vulnerability in Systemd Project Systemd with a CVSS 3.x base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-348.
Key facts
- Severity: Medium (CVSS 3.x base score 6.4)
- EPSS exploit prediction: 0% (1st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-21400
- Weakness: CWE-348
- Affected product: Systemd Project Systemd
- Published:
- Last modified:
Description
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
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 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-40226 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-40226?
- CVE-2026-40226 affects Systemd Project Systemd. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-40226?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-40226 have an EU (EUVD) identifier?
- Yes. CVE-2026-40226 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21400.
- When was CVE-2026-40226 published?
- CVE-2026-40226 was published on 2026-04-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
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