BIT-helm-2026-35205: Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install
Helm versions from 4.0.0 up to but not including 4.1.4 have a vulnerability where plugin signature verification fails open if the provenance (.prov) file is missing. This allows installation of unsigned plugins even when signature verification is required. The issue is fixed in Helm version 4.1.4.
AI Analysis
Technical Summary
Helm, a Kubernetes package manager, contains a vulnerability (CVE-2026-35205) in versions 4.0.0 through 4.1.3 where the plugin verification process fails open if the plugin's provenance file (.prov) is missing. This failure allows unsigned plugins to be installed despite signature verification being enabled. The vulnerability is addressed and fixed in Helm version 4.1.4.
Potential Impact
The vulnerability permits installation of unsigned plugins when signature verification is expected, potentially allowing untrusted or malicious plugins to be installed. This could undermine the integrity and trust model of Helm plugins, leading to possible security risks in Kubernetes environments relying on Helm for package management.
Mitigation Recommendations
Upgrade to Helm version 4.1.4 or later, where this vulnerability is fixed. The vendor advisory confirms that Helm CLI v4.1.4 addresses this issue. No other mitigation is indicated or required.
BIT-helm-2026-35205: Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install
Description
Helm versions from 4.0.0 up to but not including 4.1.4 have a vulnerability where plugin signature verification fails open if the provenance (.prov) file is missing. This allows installation of unsigned plugins even when signature verification is required. The issue is fixed in Helm version 4.1.4.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Helm, a Kubernetes package manager, contains a vulnerability (CVE-2026-35205) in versions 4.0.0 through 4.1.3 where the plugin verification process fails open if the plugin's provenance file (.prov) is missing. This failure allows unsigned plugins to be installed despite signature verification being enabled. The vulnerability is addressed and fixed in Helm version 4.1.4.
Potential Impact
The vulnerability permits installation of unsigned plugins when signature verification is expected, potentially allowing untrusted or malicious plugins to be installed. This could undermine the integrity and trust model of Helm plugins, leading to possible security risks in Kubernetes environments relying on Helm for package management.
Mitigation Recommendations
Upgrade to Helm version 4.1.4 or later, where this vulnerability is fixed. The vendor advisory confirms that Helm CLI v4.1.4 addresses this issue. No other mitigation is indicated or required.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-helm-2026-35205
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-35205"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
- Cvss Version
- null
Threat ID: 6a4c347b27e9c79719605cec
Added to database: 07/06/2026, 23:04:27 UTC
Last enriched: 07/06/2026, 23:38:22 UTC
Last updated: 07/06/2026, 23:38:22 UTC
Views: 2
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