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BIT-kyverno-2026-40868 — kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token

Affected: Bitnami: kyverno

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.

EUVD-2026-292418

fkie_cve-2026-40868

GHSA-q93q-v844-jrqp — kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token

Affected: Go: github.com/kyverno/kyverno

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.

## attacker model

the attacker can create or update a ClusterPolicy (or create a GlobalContextEntry) which uses `context.apiCall.service.url` and can choose the request URL and headers. a cross-boundary framing for real deployments is gitops: if the policy repo/controller is compromised, the ClusterPolicy/global context entry becomes untrusted input to kyverno.

## relevant links

- repository: https://github.com/kyverno/kyverno - commit: 17aeb52337fd66adb0c8126213ba076612a287a7 - callsite (token injection): https://github.com/kyverno/kyverno/blob/17aeb52337fd66adb0c8126213ba076612a287a7/pkg/engine/apicall/executor.go#L150-L173 - namespaced policy gate (servicecall blocked): https://github.com/kyverno/kyverno/blob/17aeb52337fd66adb0c8126213ba076612a287a7/pkg/engine/apicall/apiCall.go#L67-L83

## root cause

in `(*executor).addHTTPHeaders`, kyverno reads the serviceaccount token from `/var/run/secrets/kubernetes.io/serviceaccount/tok…

WID-SEC-W-2026-1152 — Kyverno: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Kyverno ausnutzen, um Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und erweiterte Berechtigungen zu erlangen.