SSRF in Red Hat Openshift Container Platform 4
CVE-2026-42965
A flaw was found in the OpenShift Router. A user with EndpointSlice write access can exploit this vulnerability by creating a Service backed by an FQDN (Fully Qualified Domain Name) EndpointSlice that resolves to a cloud metadata endpoint. This allows the router to proxy requests to the cloud metadata endpoint, leading to the disclosure of instance credentials and other sensitive metadata. This bypasses previous security measures for validating IP addresses.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-42965 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- access.redhat.com/errata/RHSA-2026:54602 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:54770 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:54583 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:57408 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:65852 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-42965?
- CVE-2026-42965 is a high-severity vulnerability in Red Hat Openshift Container Platform 4, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-05-29.
- How severe is CVE-2026-42965?
- High severity. CVSS v3 base score is 7.7 out of 10.