CVE-2026-15809
Github.com/cri-o/cri-o: fix bypass for cve-2022-4318 — /etc/passwd injection via home env
CVSS Score
7.8
EPSS Score
0.2%
EPSS Percentile
7th
A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
| CWE | CWE-134 |
| Vendor | red hat |
| Product | red hat openshift container platform 4.12 |
| Published | Jul 15, 2026 |
| Last Updated | Oct 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat OpenShift Container Platform 4.12
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.13
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.14
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.15
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.16
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.17
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.18
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.19
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.20
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.21
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.22
All versions affected Red Hat / Confidential Compute Attestation
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:57361 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:60444 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:60449 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:60452 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:62548 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:65838 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:65906 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:66385 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:67836 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:67856 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:70585 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-15809 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2500846 github.com: https://github.com/cri-o/cri-o/pull/6450 github.com: https://github.com/cri-o/cri-o/pull/6524
Credits
Red Hat would like to thank Nebojša Jaćović (Independent Security Researcher) for reporting this issue.