High severity · published Jul 15, 2026
CVE-2026-15809
Github.com/cri-o/cri-o: fix bypass for cve-2022-4318 — /etc/passwd injection via home env
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Confidential Compute Attestation · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.12 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.13 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.14 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.15 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.16 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.17 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.18 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.19 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4.21 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15809
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15809
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:57361
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60444
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60449
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60452
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:62548
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:65838
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