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TI-2026-31149 Aliases CVE-2026-42965GHSA-76ww-43j5-78x5

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

Priority LOW 34CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 6 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00396 33rd percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 6 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat OpenShift Container Platform 4.17—1789938693Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4.18—1788578875Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4.19—1786771399Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4.20—1786496552Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4.21—1786498169Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4.22—1786584196Patch availableCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 5——No fix listedCNA
  • Red Hat OpenShift Container Platform 4.17 VendorRed Hat Affected — Fixed in 1789938693 Patch available CNA
  • Red Hat OpenShift Container Platform 4.18 VendorRed Hat Affected — Fixed in 1788578875 Patch available CNA
  • Red Hat OpenShift Container Platform 4.19 VendorRed Hat Affected — Fixed in 1786771399 Patch available CNA
  • Red Hat OpenShift Container Platform 4.20 VendorRed Hat Affected — Fixed in 1786496552 Patch available CNA
  • Red Hat OpenShift Container Platform 4.21 VendorRed Hat Affected — Fixed in 1786498169 Patch available CNA
  • Red Hat OpenShift Container Platform 4.22 VendorRed Hat Affected — Fixed in 1786584196 Patch available CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 5 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:a:redhat:openshift_router:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openshift_router:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat

Remediation

Red Hat 6 advisories

  • RHSA-2026:70587 Released 2026-10-01 · Red Hat rating Important
    OpenShift Container Platform 4.17.58 bug fix and security update
    • Red Hat OpenShift Container Platform 4.17 registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/cloud-network-config-controller-rhel9 +47
  • RHSA-2026:65852 Released 2026-09-17 · Red Hat rating Important
    OpenShift Container Platform 4.18.55 bug fix and security update
    • Red Hat OpenShift Container Platform 4.18 registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/ose-apiserver-network-proxy-rhel9, registry.redhat.io/openshift4/ose-azure-cluster-api-controllers-rhel9 +19
  • RHSA-2026:57408 Released 2026-08-26 · Red Hat rating Important
    OpenShift Container Platform 4.19.44 bug fix and security update
    • Red Hat OpenShift Container Platform 4.19 registry.redhat.io/openshift4/ose-apiserver-network-proxy-rhel9, registry.redhat.io/openshift4/ose-azure-workload-identity-webhook-rhel9, registry.redhat.io/openshift4/ose-cli-rhel9 +9
Show 3 more Red Hat advisories
  • RHSA-2026:54770 Released 2026-08-18 · Red Hat rating Important
    OpenShift Container Platform 4.22.10 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 registry.redhat.io/openshift4/ose-agent-installer-csr-approver-rhel9, registry.redhat.io/openshift4/ose-azure-file-csi-driver-rhel9, registry.redhat.io/openshift4/ose-cluster-image-registry-rhel9-operator +11
  • RHSA-2026:54583 Released 2026-08-18 · Red Hat rating Important
    OpenShift Container Platform 4.20.34 bug fix and security update
    • Red Hat OpenShift Container Platform 4.20 registry.redhat.io/openshift4/ose-cli-rhel9, registry.redhat.io/openshift4/ose-console-rhel9, registry.redhat.io/openshift4/ose-haproxy-router-rhel9 +2
  • RHSA-2026:54602 Released 2026-08-18 · Red Hat rating Important
    OpenShift Container Platform 4.21.29 bug fix and security update
    • Red Hat OpenShift Container Platform 4.21 registry.redhat.io/openshift4/ose-cli-rhel9, registry.redhat.io/openshift4/ose-console-rhel9, registry.redhat.io/openshift4/ose-haproxy-router-rhel9 +6

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
Red Hat OpenShift Container Platform 4.17Fixed RHSA-2026:70587
Red Hat OpenShift Container Platform 4.18Fixed RHSA-2026:65852
Red Hat OpenShift Container Platform 4.19Fixed RHSA-2026:57408
Red Hat OpenShift Container Platform 4.20Fixed RHSA-2026:54583
Red Hat OpenShift Container Platform 4.21Fixed RHSA-2026:54602
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:54770
Not affected: 6 products
  • Red Hat OpenShift Container Platform 4.17
  • Red Hat OpenShift Container Platform 4.18
  • Red Hat OpenShift Container Platform 4.19
  • Red Hat OpenShift Container Platform 4.20
  • Red Hat OpenShift Container Platform 4.21
  • Red Hat OpenShift Container Platform 4.22

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42965
  2. 2026-10-03 Alias added: GHSA-76ww-43j5-78x5
  3. 2026-11-04 Affected versions changed · CNA
  4. 2026-11-04 Affected versions changed · Red Hat

References

Advisory 8

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-34021 Linux kernel skb coalescing drops shared-frag marker KEVCVSS 3.1HIGH 7.8
  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
See all 340 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences