CVE-2025-47281 (GCVE-0-2025-47281)
Vulnerability from cvelistv5 – Published: 2025-07-23 20:35 – Updated: 2025-07-23 20:49
VLAI
EPSS
VEX
Title
Kyverno's Improper JMESPath Variable Evaluation Leads to Denial of Service
Summary
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.
Severity
7.7 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-23 20:49 UTC
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/kyverno/kyverno/security/advis… | x_refsource_CONFIRM |
| https://github.com/kyverno/kyverno/commit/cbd7d4c… | x_refsource_MISC |
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