Vulnerability in Red Hat Openshift Container Platform 4
CVE-2026-1784
The Route OpenShift resource allows to define routes to make pods reachable at a subdomain through HAProxy. It was found that the checks performed on the spec.path YAML stanza in a Route document was insufficient and could allow a controlled injection of the HAProxy configuration.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (8.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Red Hat Openshift Container Platform 4
- Red Hat Openshift Container Platform 4.13 — versions 1781123014
- Red Hat Openshift Container Platform 4.14 — versions 1781870101
- Red Hat Openshift Container Platform 4.15 — versions 1781928857
- Red Hat Openshift Container Platform 4.16 — versions 1780962617
- Red Hat Openshift Container Platform 4.18 — versions 1780988280
- Red Hat Openshift Container Platform 4.19 — versions 1780043338
- Red Hat Openshift Container Platform 4.2 — versions 1780990977
- Red Hat Openshift Container Platform 4.20 — versions 1780990977
- Red Hat Openshift Container Platform 4.21 — versions 1780444348
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-1784 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:23246 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:23241 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:25194 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:25182 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:25045 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:26543 (vendor-advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- access.redhat.com/errata/RHSA-2026:28893 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-1784?
- CVE-2026-1784 is a high-severity vulnerability in Red Hat Openshift Container Platform 4, classified under CWE-15. CVSS score: 8.8/10. Published 2026-06-02.
- How severe is CVE-2026-1784?
- High severity. CVSS v3 base score is 8.8 out of 10.