CVE-2025-32387: Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow

6.5 CVSS

Description

Helm is a package manager for Charts for Kubernetes. A JSON Schema file within a chart can be crafted with a deeply nested chain of references, leading to parser recursion that can exceed the stack size limit and trigger a stack overflow. This issue has been resolved in Helm v3.17.3.

Classification

CVE ID: CVE-2025-32387

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.5

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types

CWE-121: Stack-based Buffer Overflow CWE-674: Uncontrolled Recursion

Affected Products

Vendor: helm

Product: helm

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 10.21% (scored less or equal to compared to others)

EPSS Date: 2025-04-20 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-32387
https://github.com/helm/helm/security/advisories/GHSA-5xqw-8hwv-wg92
https://github.com/helm/helm/commit/d8ca55fc669645c10c0681d49723f4bb8c0b1ce7

Timeline