🛡️ CVE-2026-35205 — helm
Description
Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install
Helm is a package manager for Charts for Kubernetes. In Helm versions >=4.0.0 and <=4.1.3, Helm will install plugins missing provenance (.prov file) when signature verification is required.
Impact
The bug allows plugin authors to omit provenance (signing) data from plugins, bypassing plugin signature verification upon plugin install/update.
Notably, plugin hooks will be executed as designed on the installed plugin, enabling a malicious plugin to execute arbitrary code.
Patches
This issue has been patched in Helm v4.1.4
Installing/updating a plugin with missing provenance will error if signature verification is required.
Workarounds
Users may manually validate that a plugin archive is not missing provenance data (.prov file) before installation.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
Affected software
CVE-2026-35205 is recorded against 2 packages.
- helm
- helm.sh/helm/v4
Timeline and source
Published on 13 April 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.
References
github.com (Web)
github.com (Web)
github.com (Web)
helm.sh (Web)
nvd.nist.gov (Web)
access.redhat.com (Web)
access.redhat.com (Web)
bugzilla.redhat.com (Web)
security.access.redhat.com (Web)
Details
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| helm | — | — |
| helm.sh/helm/v4 | — | — |
References
Similar Threats
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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