Vulnerability · Published Apr 9, 2025 · Assigned by GitHub_M
CVE-2025-32387Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow
Medium 6.5
In plain English
A medium-severity stack buffer overflow in helm from helm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 56.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | helm.sh/helm/v3 | 3.17.3 | GHSA-5xqw-8hwv-wg92 |
| Go | helm.sh/helm/v3 | 3.17.3 | GO-2025-3602 |
| Ubuntu:22.04:LTS | helm | no fix listed | UBUNTU-CVE-2025-32387 |
| Ubuntu:24.04:LTS | helm | no fix listed | UBUNTU-CVE-2025-32387 |
| Ubuntu:25.10 | helm | no fix listed | UBUNTU-CVE-2025-32387 |
| Ubuntu:26.04:LTS | helm | no fix listed | UBUNTU-CVE-2025-32387 |
| Ubuntu:26.10 | helm | no fix listed | UBUNTU-CVE-2025-32387 |
Affected products (as reported)
Weakness: CWE-121, CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://github.com/helm/helm/security/advisories/GHSA-5xqw-8hwv-wg92 x_refsource_CONFIRM
- https://github.com/helm/helm/commit/d8ca55fc669645c10c0681d49723f4bb8c0b1ce7 x_refsource_MISC