Bug 2456927 (CVE-2026-35205)

Summary: CVE-2026-35205 github.com/helm/helm: helm.sh/helm/v4: Helm: Arbitrary code execution due to insufficient plugin provenance verification
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Helm, a package manager for Kubernetes. A remote attacker could exploit this vulnerability by providing a malicious plugin that lacks a provenance file. Even when signature verification is enabled, Helm would incorrectly install this unverified plugin, bypassing critical security checks. This could lead to arbitrary code execution within the Kubernetes environment, allowing an attacker to gain unauthorized control.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2457443, 2457446    
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Description OSIDB Bzimport 2026-04-09 16:01:32 UTC
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.