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

Quick assessment

Affected
helm helm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Helm是CNCF基金会的一款Kubernetes包管理器。 Helm 3.20.1及之前版本和4.1.3及之前版本存在路径遍历漏洞，该漏洞源于特制的Chart可能导致helm pull --untar命令将Chart内容写入预期之外的输出目录。

AI Predicted 5.5 Difficulty: Easy EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1059.004 · Unix Shell
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I. Basic Information for CVE-2026-35206

Vulnerability Information
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Vulnerability Title
Helm Chart extraction output directory collapse via `Chart.yaml` name dot-segment
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Helm 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Helm是CNCF基金会的一款Kubernetes包管理器。 Helm 3.20.1及之前版本和4.1.3及之前版本存在路径遍历漏洞，该漏洞源于特制的Chart可能导致helm pull --untar命令将Chart内容写入预期之外的输出目录。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
helm helm >= 4.0.0, < 4.1.4 -

II. Public POCs for CVE-2026-35206

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III. Intelligence Information for CVE-2026-35206

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Patches & Fixes for CVE-2026-35206 (1)

Vendor Pages for CVE-2026-35206 (1)

Same Patch Batch · helm · 2026-04-09 · 3 CVEs total

CVE-2026-35204 Helm has a path traversal in plugin metadata version enables arbitrary file write outside
CVE-2026-35205 Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin inst

IV. Related Vulnerabilities

Same product: helm
Same vendor: helm
Same weakness: CWE-22

V. Comments for CVE-2026-35206

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