CVE-2025-32387
Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow
Impact
A Helm contributor discovered that a specially crafted JSON Schema within a chart can lead to a stack overflow. ### Impact 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. ### Patches This issue has been resolved in Helm v3.17.3. ### Workarounds Ensure that the JSON Schema within any charts loaded by Helm does not have a large number of nested references. These JSON Schema files are larger than 10 MiB. ### For more information Helm's security policy is spelled out in detail in our [SECURITY](https://github.com/helm/community/blob/master/SECURITY.md) document. ### Credits Disclosed by Jakub Ciolek at AlphaSense.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | helm.sh/helm/v3 | < 3.17.3 | 3.17.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Helm | Helm | before 3.17.3 |