CVE-2026-16543

7.1 highEPSS 0.2%

High (7.1). EPSS 0.2% chance of exploitation in the next 30 days.

Kong Operator's embedded Kong Kubernetes Ingress Controller (KIC) allows a user with namespace-scoped Secret creation privileges to cause a cluster-wide ingress configuration denial of service. The embedded KIC collects CA-certificate Secrets across all watched namespaces using a label selector alone, without ingress-class or namespace restrictions. The CA-certificate primary key is derived from a user-supplied field in the Secret. Duplicate CA-certificate IDs cause Kong Gateway to reject the entire configuration document and halting all ingress changes cluster-wide.

Severity

CVSS 4.0

7.1 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
CWEs: CWE-400, CWE-862
Published: 2026-07-29
Modified: 2026-07-30
Record from: the NVD, synced 2026-10-19

References

https://github.com/Kong/kong-operator/security/advisories/GHSA-h4fh-j7xg-vwcx

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