CVE-2026-35204: Helm has a path traversal in plugin metadata version enables arbitrary file write outside Helm plugin directory
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
Event History
Frequently Asked Questions
What is the severity of CVE-2026-35204?
CVE-2026-35204 is considered a high severity vulnerability due to its potential for arbitrary file writes leading to system compromise.
How do I fix CVE-2026-35204?
To fix CVE-2026-35204, upgrade Helm to version 4.1.4 or later.
What versions of Helm are affected by CVE-2026-35204?
Helm versions 4.0.0 to 4.1.3 are affected by CVE-2026-35204.
What is the nature of the vulnerability in CVE-2026-35204?
CVE-2026-35204 involves a path traversal in plugin metadata allowing for arbitrary file writes outside the Helm plugin directory.
Can CVE-2026-35204 be exploited remotely?
Yes, CVE-2026-35204 can potentially be exploited remotely if a user installs or updates a specially crafted Helm plugin.