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Kong Ingress Controller for Kubernetes (KIC): Cross-namespace TLS Secret Exfiltration in Gateways with GatewayClass missing `konghq.com/gatewayclass-unmanaged: 'true'` annotation — GHSA-M23H-6MWM-39M8

GitHub · GitHub · GHSA-M23H-6MWM-39M8

ID
GHSA-M23H-6MWM-39M8
Date
Activity
Source
GitHub
Vendor
GitHub
Threat
medium
CVSS
5.6

Summary

## Summary A vulnerability in the Kong Ingress Controller (KIC) allows for the unauthorized exfiltration of TLS certificates and private keys across Kubernetes namespace boundaries. In "managed" mode (where the `GatewayClass` lacks an unmanaged annotation), the Gateway TLS translator skips critical status checks. This bypass allows the translator to fetch Secrets from any namespace KIC watches, even when a…

Product

go: github.com/kong/kubernetes-ingress-controller/v3 | go: github.com/kong/kubernetes-ingress-controller/v2 | go: github.com/kong/kubernetes-ingress-controller

What to do

General, cautious steps (verify details in the official source):

  • Review exposure and plan remediation based on risk and environment.
  • Identify affected product versions in your inventory and verify whether you are impacted.
  • Apply vendor patches/updates or recommended mitigations as soon as available.
  • Read the official advisory for exact affected versions and remediation steps.

Official advisory

Related advisories

GitHub GitHub 2026-W21