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CVE-2026-35205— Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install

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 4.1.3及之前版本存在安全漏洞，该漏洞源于在需要签名验证时仍会安装缺少来源证明的插件。

AI Predicted 6.5 Difficulty: Trivial EPSS 0.28% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
helm helm >= 4.0.0, < 4.1.4 affected
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I. Basic Information for CVE-2026-35205

Vulnerability Information
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Vulnerability Title
Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install
Source: CVE Program / CVE List V5
Vulnerability Description
Helm is a package manager for Charts for Kubernetes. From 4.0.0 to 4.1.3, Helm will install plugins missing provenance (.prov file) when signature verification is required. This vulnerability is fixed in 4.1.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未能安全地进行程序失效(Failing Open)
Source: CVE Program / CVE List V5
Vulnerability Title
Helm 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Helm是CNCF基金会的一款Kubernetes包管理器。 Helm 4.1.3及之前版本存在安全漏洞，该漏洞源于在需要签名验证时仍会安装缺少来源证明的插件。
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-2026-35205

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III. Intelligence Information for CVE-2026-35205

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Patches & Fixes for CVE-2026-35205 (1)

Vendor Pages for CVE-2026-35205 (2)

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

IV. Related Vulnerabilities

Same product: helm
Same vendor: helm
Same weakness: CWE-636

V. Comments for CVE-2026-35205

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