CVE-2025-55199
MEDIUM6.5EPSS 0.02%Helm Charts with Specific JSON Schema Values Can Cause Memory Exhaustion
Description
A Helm contributor discovered that it was possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination. ### Impact A malicious chart can point `$ref` in _values.schema.json_ to a device (e.g. `/dev/*`) or other problem file which could cause Helm to use all available memory and have an out of memory (OOM) termination. ### Patches This issue has been resolved in Helm v3.18.5. ### Workarounds Make sure that all Helm charts that are being loaded into Helm doesn't have any reference of `$ref` pointing to `/dev/zero`. ### References 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 (4)
- Bitnami/helmfrom 0, < 3.18.5
- Go/helm.sh/helmfrom 0
- Go/helm.sh/helm/v3from 0, < 3.18.5
- Go/helm.sh/helm/v3from 0, < 3.18.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |