Vulnerability · Published Apr 9, 2026 · Assigned by GitHub_M

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

Medium 4.8

In plain English

A medium-severity path traversal 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 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)4.8Medium

Exploit odds (30 days)0.2%top 89.2% 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. 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	helm.sh/helm/v3	3.20.2	GHSA-hr2v-4r36-88hr
Go	helm.sh/helm/v3	3.20.2	GO-2026-5435
Go	helm.sh/helm/v4	4.1.4	GHSA-hr2v-4r36-88hr

Affected products (as reported)

Vendor	Product	Versions
helm	helm	>= 4.0.0, < 4.1.4< 3.20.2

Weakness: CWE-22 · 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

References

https://github.com/helm/helm/security/advisories/GHSA-hr2v-4r36-88hr x_refsource_CONFIRM
https://github.com/helm/helm/commit/4e7994d4467182f535b6797c94b5b0e994a91436 x_refsource_MISC
https://github.com/helm/helm/releases/tag/v4.1.4 x_refsource_MISC