Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-15809

CVE-2026-15809HIGH

Red Hat Red Hat OpenShift Container Platform 4.12 — Github.com/cri-o/cri-o: fix bypass for cve-2022-4318 — /etc/passwd injection via home env

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0018    7.1     —

AFFECTED
  Product                                    Versions     Fixed
  Red Hat OpenShift Container Platform 4.12  unspecified  0:1.25.5-36.rhaos4.12.git2e7f657.el8
  Red Hat OpenShift Container Platform 4.13  unspecified  0:1.26.5-32.rhaos4.13.git1088e36.el8
  Red Hat OpenShift Container Platform 4.14  unspecified  0:1.27.8-22.rhaos4.14.git0633bf1.el8
  Red Hat OpenShift Container Platform 4.15  unspecified  0:1.28.11-17.rhaos4.15.git48e6ddb.el8
  Red Hat OpenShift Container Platform 4.16  unspecified  0:1.29.13-14.rhaos4.16.git84cfdc6.el8
  Red Hat OpenShift Container Platform 4.17  unspecified  0:1.30.14-13.rhaos4.17.git3a25d98.el8
  Red Hat OpenShift Container Platform 4.18  unspecified  0:1.31.13-14.rhaos4.18.gitf2de9ac.el8
  Red Hat OpenShift Container Platform 4.19  unspecified  0:1.32.13-11.rhaos4.19.git089e95c.el9
  Red Hat OpenShift Container Platform 4.20  unspecified  0:1.33.13-5.rhaos4.20.git7ebc848.el9
  Red Hat OpenShift Container Platform 4.21  unspecified  0:1.34.11-4.rhaos4.21.git358c4b4.el9
  + 4 more

TIMELINE
  Jul 15  Reserved by redhat
  Jul 15  Published (CNA: redhat)
  Aug 25  PATCH SHIPPED — CVE-2026-15809 (Red Hat OpenShift Container Platform 4.22). Fixed in Red Hat OpenShift Container Platform 4.22 0:1.35.6-5.rhaos4.22.git41f610b.el9.

CWE-134, CWE-116 · CNA: redhat · CVSS v3.1 · 15 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 15, 2026	Reserved	Reserved by redhat
July 15, 2026	Published	Published (CNA: redhat)
August 25, 2026	PATCH SHIPPED	PATCH SHIPPED — CVE-2026-15809 (Red Hat OpenShift Container Platform 4.22). Fixed in Red Hat OpenShift Container Platform 4.22 0:1.35.6-5.rhaos4.22.git41f610b.el9.

Affected

Affected products and packages — 14 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat OpenShift Container Platform 4.12	—	—	0:1.25.5-36.rhaos4.12.git2e7f657.el8
Red Hat	Red Hat OpenShift Container Platform 4.13	—	—	0:1.26.5-32.rhaos4.13.git1088e36.el8
Red Hat	Red Hat OpenShift Container Platform 4.14	—	—	0:1.27.8-22.rhaos4.14.git0633bf1.el8
Red Hat	Red Hat OpenShift Container Platform 4.15	—	—	0:1.28.11-17.rhaos4.15.git48e6ddb.el8
Red Hat	Red Hat OpenShift Container Platform 4.16	—	—	0:1.29.13-14.rhaos4.16.git84cfdc6.el8
Red Hat	Red Hat OpenShift Container Platform 4.17	—	—	0:1.30.14-13.rhaos4.17.git3a25d98.el8
Red Hat	Red Hat OpenShift Container Platform 4.18	—	—	0:1.31.13-14.rhaos4.18.gitf2de9ac.el8
Red Hat	Red Hat OpenShift Container Platform 4.19	—	—	0:1.32.13-11.rhaos4.19.git089e95c.el9
Red Hat	Red Hat OpenShift Container Platform 4.20	—	—	0:1.33.13-5.rhaos4.20.git7ebc848.el9
Red Hat	Red Hat OpenShift Container Platform 4.21	—	—	0:1.34.11-4.rhaos4.21.git358c4b4.el9
Red Hat	Red Hat OpenShift Container Platform 4.22	—	—	0:1.35.6-5.rhaos4.22.git41f610b.el9
Red Hat	Confidential Compute Attestation	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—

Weaknesses

CWE-134 · CWE-116

References (15)

Authoritative record: CVE-2026-15809 at cve.org

Vendors: red hat

Weaknesses: CWE-134 · CWE-116

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-15809 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.