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TI-2026-47429 Aliases CVE-2026-66785GHSA-37mq-728j-5q43

Submariner: submariner: missing validation of remote endpoint subnets and clusterid enables cross-cluster traffic hijack

Priority LOW 39CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-345.

Summary

A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00206 10th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 Advanced Cluster Management for Kubernetes 2.16—1790670439Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670231Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670243Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670508Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670233Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670912Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.16—1790670254Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788023916Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788023940Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788105072Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788043964Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788043961Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788073481Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2.17—1788043970Patch availableCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2——No fix listedCNA
Red HatRed Hat Advanced Cluster Management for Kubernetes 2——No fix listedCNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670439 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670231 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670243 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670508 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670233 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670912 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1790670254 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788023916 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788023940 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788105072 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788043964 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788043961 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788073481 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1788043970 Patch available CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Advanced Cluster Management for Kubernetes 2 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 3

CPEVersionsRoleVendor
cpe:/a:redhat:acm:2.16::el92.16—Red Hat
cpe:/a:redhat:acm:2.17::el92.17—Red Hat
cpe:/a:redhat:acm:22—Red Hat
  • cpe:/a:redhat:acm:2.16::el9 Versions 2.16 — ·Red Hat
  • cpe:/a:redhat:acm:2.17::el9 Versions 2.17 — ·Red Hat
  • cpe:/a:redhat:acm:2 Versions 2 — ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2026:85227 Released 2026-10-19 · Red Hat rating Important
    Submariner v0.23 security fixes and container updates
    • Red Hat Advanced Cluster Management for Kubernetes 2.16 registry.redhat.io/rhacm2/lighthouse-agent-rhel9, registry.redhat.io/rhacm2/lighthouse-coredns-rhel9, registry.redhat.io/rhacm2/subctl-rhel9 +4
  • RHSA-2026:63016 Released 2026-09-03 · Red Hat rating Important
    Submariner v0.24 security fixes and container updates
    • Red Hat Advanced Cluster Management for Kubernetes 2.17 registry.redhat.io/rhacm2/lighthouse-agent-rhel9, registry.redhat.io/rhacm2/lighthouse-coredns-rhel9, registry.redhat.io/rhacm2/subctl-rhel9 +4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat Advanced Cluster Management for Kubernetes 2.16, Red Hat Advanced Cluster Management for Kubernetes 2.17 — RHSA-2026:63016

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2026-47432 Lighthouse: lighthouse: arbitrary namespace injection via attacker-controlled broker labelPriority MEDIUM 44
    • TI-2026-47431 Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice ip addressesPriority LOW 39
    • TI-2026-47425 Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace verbosityPriority LOW 32
    Show all 7 records → Advisory →
  • Advisory ·

    Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat Advanced Cluster Management for Kubernetes 2.16, Red Hat Advanced Cluster Management for Kubernetes 2.17 — RHSA-2026:85227

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2026-47432 Lighthouse: lighthouse: arbitrary namespace injection via attacker-controlled broker labelPriority MEDIUM 44
    • TI-2026-47431 Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice ip addressesPriority LOW 39
    • TI-2026-47425 Submariner-operator: broker serviceaccount secret (token + ca) logged in full at trace verbosityPriority LOW 32
    Show all 7 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Advanced Cluster Management for Kubernetes 2AffectedNo fix yet
Red Hat Advanced Cluster Management for Kubernetes 2.16Fixed RHSA-2026:85227
Red Hat Advanced Cluster Management for Kubernetes 2.17Fixed RHSA-2026:63016
Not affected: 2 products
  • Red Hat Advanced Cluster Management for Kubernetes 2.16
  • Red Hat Advanced Cluster Management for Kubernetes 2.17

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66785
  2. 2026-10-03 Alias added: GHSA-37mq-728j-5q43
  3. 2026-10-13 Title updated · CNA
  4. 2026-10-13 CVSS score changed · CNA
  5. 2026-10-13 Weakness changed · CNA
  6. 2026-10-15 Affected versions changed · Red Hat
  7. 2026-10-15 CVSS score changed · Red Hat
  8. 2026-10-19 Fix available: rhacm2/lighthouse-agent-rhel9@1790670439, rhacm2/lighthouse-coredns-rhel9@1790670231, rhacm2/subctl-rhel9@1790670243 +4 · CNA
  9. 2026-10-19 1 new reference · CNA
  10. 2026-10-20 Fix available: RHSA-2026:85227 · Red Hat
  11. 2026-10-20 Fix available: Red Hat Advanced Cluster Management for Kubernetes 2.16 · Red Hat

References

Advisory 2

Other 2

  • 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-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

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