CVE-2026-40868
8.1 · HIGHOverview
CVE-2026-40868 is a high-severity vulnerability affecting kyverno kyverno. It was published on April 21, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from kyverno. Update kyverno to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| kyverno | kyverno | >= 0, < 1.16.4 | Affected |
Frequently Asked Questions
What is CVE-2026-40868?
CVE-2026-40868 is a high-severity vulnerability affecting kyverno kyverno. It was published on April 21, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2026-40868?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-40868?
Check the references section for vendor advisories and patches from kyverno. Update kyverno to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-40868?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40868 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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