CVE-2026-40226: systemd_project systemd Use of Less Trusted Source
CVSS: 6.4v3.1MediumAnalyzed
AliasesSUSE-SU-2026:22736-1SUSE-SU-2026:22890-1SUSE-SU-2026:2785-1SUSE-SU-2026:2809-1SUSE-SU-2026:3244-1UBUNTU-CVE-2026-40226DEBIAN-CVE-2026-40226CGA-3hg5-5pqv-78g3CGA-6qfr-hm5p-6mx8CGA-7mm5-f3fx-hpf6CGA-84vw-pjm8-f646CGA-jvh4-w9gf-q5p5CGA-jwpc-4fm6-598rCGA-mf6h-c9vm-xfrwCGA-pp42-mr9w-j77fCGA-wrr7-2xr2-jc75CGA-wv63-24f9-89xq
Published 10-04-2026Last modified 14-04-2026
Vulnerability summary
CVE-2026-40226 is a medium (CVSS 6.4) Use of Less Trusted Source vulnerability in systemd_project systemd. EPSS estimates a 0.09% chance of exploitation in the next 30 days, higher than 0.5% of scored vulnerabilities.
CVSS score
6.4/10
010
Medium · v3.1 (CVE.org)EPSS score
0.09%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 10-04-2026PublishedVulnerability first disclosed.
- 14-04-2026Last modifiedVulnerability information updated.
Description
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 6.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HSourcesAll 5 agree
- OSV · UbuntuEcosystem advisory · calculated6.4MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.4MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated6.4MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- NVDNIST6.4MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.09%
Chance of exploitation in the next 30 days
Percentile
1%
Versus all other CVEs
30-day change
+0.02 pp
From 0.07% on 19-09-2026
19-09-202619-10-2026
EPSS score0.09%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse8 products
- systemd&distro=SUSE Linux Enterprise Micro 5.2< 246.16-150300.7.74.1
- systemd&distro=SUSE Linux Enterprise Micro 5.3< 249.17-150400.8.64.1
- systemd&distro=SUSE Linux Enterprise Micro 5.4< 249.17-150400.8.64.1
- systemd&distro=SUSE Linux Enterprise Micro 5.5< 249.17-150400.8.64.1
- systemd&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 254.27-150600.4.71.2
Chainguard5 products
- py3-systemd< 2026.05.06_git20260429-r0
- py3.10-systemdAll versions (No fix recorded)
- py3.11-systemdAll versions (No fix recorded)
- py3.12-systemd< 2026.05.06_git20260429-r4
- py3.13-systemd< 2026.05.06_git20260429-r0
Debian1 product
- systemd< 252.39-1~deb12u2 | < 257.13-1~deb13u1 | < 260~rc3-1
Systemd1 product
- systemd≥ 233, < 260
Systemd_project1 product
- systemd≥ 233, < 257.12 | ≥ 258, < 258.6 | ≥ 259, < 259.4
Ubuntu1 product
- systemdAll versions (No fix recorded) | < 249.11-0ubuntu3.21 | < 255.4-1ubuntu8.16 | < 257.9-0ubuntu2.5
6 vendors · 17 products
