A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.
CVE-2026-4105
MEDIUMNVD 6.76.7—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 6.7 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.7Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 6.7
- EG Score
- 6.7(medium)
- EPSS
- 3.9%
- KEV
- Not listed
Published
March 13, 2026
Last Modified
April 30, 2026
Advisory Details (4)
Auto-updated Apr 30, 2026Patch available. Sources: redhat, github.
github Patch Available
Local privilege escalation in systemd-machined · Advisory · systemd/systemd · GitHub
https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862redhat Patch Available
2447262 – (CVE-2026-4105) CVE-2026-4105 systemd: systemd: Privilege escalation via improper access control in RegisterMachine D-Bus method
https://bugzilla.redhat.com/show_bug.cgi?id=2447262redhat Patch Available
Vendor Advisories for CVE-2026-4105(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | systemd-main-260.1-2.1.hum1 | 2026-04-09 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Frequently asked(5)
What is CVE-2026-4105?
CVE-2026-4105 is a medium vulnerability published on March 13, 2026. A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a…
When was CVE-2026-4105 disclosed?
CVE-2026-4105 was first published in the National Vulnerability Database on March 13, 2026, with the most recent update on April 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4105 actively exploited?
CVE-2026-4105 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4105?
CVE-2026-4105 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-4105?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4105, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-4105
Is Your Infrastructure Affected by CVE-2026-4105?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.