CVE-2026-40868: Kyverno

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno’s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.

Affected products

• Kyverno Kyverno: before 1.16.4 (fixed in 1.16.4)

Published 2026-04-21. Last modified 2026-06-17.