REDHAT-BUG-2456933: High severity Helm helm vulnerability
Helm is a package manager for Charts for Kubernetes. From 4.0.0 to 4.1.3, a specially crafted Helm plugin, when installed or updated, will cause Helm to write the contents of the plugin to an arbitrary filesystem location. To prevent this, validate that the plugin.yaml of the Helm plugin does not include a version: field containing POSIX dot-dot path separators ie. "/../". This vulnerability is fixed in 4.1.4.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Helmto a version that resolves this vulnerability.Fixed in 4.1.4 - Configuration
Before installing or updating a Helm plugin, validate that its plugin.yaml does not include a version: field containing POSIX dot-dot path separators (e.g., "../").
Helm plugin (plugin.yaml) plugin.yaml version field (dot-dot path separators) = Disallow POSIX dot-dot path separators (e.g., "../") in the version field
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2456933?
The severity of REDHAT-BUG-2456933 is classified as high with a score of 7.
What versions of Helm are affected by REDHAT-BUG-2456933?
REDHAT-BUG-2456933 affects Helm versions from 4.0.0 to 4.1.3.
How do I fix REDHAT-BUG-2456933?
To fix REDHAT-BUG-2456933, ensure that the plugin.yaml of any Helm plugin being installed is validated for safe content.
What is the impact of REDHAT-BUG-2456933 on system security?
The impact of REDHAT-BUG-2456933 is that a malicious Helm plugin can write files to arbitrary locations on the filesystem, potentially compromising system security.
When was REDHAT-BUG-2456933 published?
REDHAT-BUG-2456933 was published on April 9, 2026.