Improper input validation in Helm - CVE-2026-35206
Published: April 10, 2026
Vulnerability identifier: #VU125751
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-35206
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Helm Project
Affected software:
Helm
Helm
Detailed vulnerability description
The vulnerability allows a remote attacker to overwrite files in the target output directory.
The vulnerability exists due to improper input validation in Chart extraction logic when processing a specially crafted Chart with helm pull --untar. A remote attacker can supply a crafted Chart whose Chart.yaml name is . to overwrite files in the target output directory.
User interaction is required to pull and extract the crafted Chart.
How to mitigate CVE-2026-35206
Install security update from vendor's website.