Server-side Request Forgery (SSRF) Affecting github.com/kyverno/kyverno/pkg/cel/policies/vpol/compiler package, versions <1.16.4>=1.17.0-rc.1 <1.17.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMKYVERNOKYVERNOPKGCELPOLICIESVPOLCOMPILER-15855297
- published31 Mar 2026
- disclosed30 Mar 2026
- creditStepansky
Introduced: 30 Mar 2026
CVE-2026-4789 Â (opens in a new tab)How to fix?
Upgrade github.com/kyverno/kyverno/pkg/cel/policies/vpol/compiler to version 1.16.4, 1.17.2 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the CEL-based HTTP functions. An attacker can make unauthorized network requests to internal or external resources and exfitrate sensitive information (AWS IAM credentials, GCP tokens) by crafting malicious namespaced policy that sends an internal http.Get() request, captures the response in a CEL variable, and exfiltrates it via the policy’s messageExpression field returned in the admission denial.