Vulnerability · Published Aug 13, 2025 · Assigned by GitHub_M

CVE-2025-55198Helm May Panic Due To Incorrect YAML Content

Medium 6.5

In plain English

A medium-severity security flaw 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 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 70.7% 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. Prior to version 3.18.5, when parsing Chart.yaml and index.yaml files, an improper validation of type error can lead to a panic. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring YAML files are formatted as Helm expects prior to processing them with Helm.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	helm.sh/helm	no fix listed	GO-2025-3888
Go	helm.sh/helm/v3	3.18.5	GHSA-f9f8-9pmf-xv68
Go	helm.sh/helm/v3	3.18.5	GO-2025-3888

Affected products (as reported)

Vendor	Product	Versions
helm	helm	< 3.18.5

Weakness: CWE-908 · 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-f9f8-9pmf-xv68 x_refsource_CONFIRM
https://github.com/helm/helm/commit/ec5f59e2db56533d042a124f5bae54dd87b558e6 x_refsource_MISC