CVE-2025-47281 Information

Jul 24, 2025 cve

Description

Kyverno is a policy engine designed for cloud native platform engineering teams. In versions 1.14.1 and below a Denial of Service (DoS) vulnerability exists due to improper handling of JMESPath variable substitutions. Attackers with permissions to create or update Kyverno policies can craft expressions using the @ variable combined with a pipe and an invalid JMESPath function (e.g. @ | non_existent_function ). This leads to a nil value being substituted into the policy structure. Subsequent processing by internal functions specifically getValueAsStringMap which expect string values results in a panic due to a type assertion failure (interface is nil not string). This crashes Kyverno worker threads in the admission controller and causes continuous crashes of the reports controller pod. This is fixed in version 1.14.2.

Reference

https://github.com/kyverno/kyverno/commit/cbd7d4ca24de1c55396fc3295e9fc3215832be7c https://github.com/kyverno/kyverno/security/advisories/GHSA-r5p3-955p-5ggq https://github.com/kyverno/kyverno/security/advisories/GHSA-r5p3-955p-5ggq

CNNVD-202507-3047 (Published: 2025-07-23)

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