What’s Vulnerable › Vulnerabilities

CVE-2026-42965: Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-29 · updated 2026-10-01
• Weakness: CWE-918

Description

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.

Affected products

• Red Hat OpenShift Container Platform 4.18: 4.0
• RedHat Openshift Router: all versions

References

• https://access.redhat.com/errata/RHSA-2026:54583
• https://access.redhat.com/errata/RHSA-2026:54602
• https://access.redhat.com/errata/RHSA-2026:54770
• https://access.redhat.com/errata/RHSA-2026:57408
• https://access.redhat.com/errata/RHSA-2026:65852
• https://access.redhat.com/errata/RHSA-2026:70587
• https://access.redhat.com/security/cve/CVE-2026-42965
• https://bugzilla.redhat.com/show_bug.cgi?id=2483184
• https://access.redhat.com/errata/RHSA-2026:54583
• https://access.redhat.com/errata/RHSA-2026:54602
• https://access.redhat.com/errata/RHSA-2026:54770
• https://access.redhat.com/errata/RHSA-2026:57408

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