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.
Published Apr 10, 2026 · corrected/updated Jun 17, 2026 · systemd project systemd · evidence confidence medium
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-40226 is a medium public vulnerability record for systemd project systemd. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether systemd project systemd is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: systemd project/systemd. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 6.4. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-348. Sources contributing to this record: cve_org, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 10, 2026 · NIST NVD
Detected
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Jun 17, 2026 · NIST NVD
Updated
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Affected
- cpe systemd project/systemdversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-40226
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-40226
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
nvd.nist.gov