CVE-2025-55199: Helm

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, it is 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. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring all Helm charts that are being loaded into Helm do not have any reference of $ref pointing to /dev/zero.

Affected products

• Helm Helm: before 3.18.5 (fixed in 3.18.5)

Published 2025-08-14. Last modified 2026-06-17.