CVE-2026-35206 MEDIUM

CVE-2026-35206: Helm Chart extraction output directory collapse via `Chart.yaml` name dot-segment

Vendor Helm
Product helm
Weakness CWE-22 · Path traversal
Published April 9, 2026
Last update April 14, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Helm is a package manager for Charts for Kubernetes. In Helm versions <=3.20.1 and <=4.1.3, a specially crafted Chart will cause helm pull --untar [chart URL | repo/chartname] to write the Chart's contents to the immediate output directory (as defaulted to the current working directory; or as given by the --destination and --untardir flags), rather than the expected output directory suffixed by the chart's name. This vulnerability is fixed in 3.20.2 and 4.1.4.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 14, 2026 Record updated