🛡️ CVE-2026-35205 — helm

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-636 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE CWE-636
Public Exploit ✅ No
Source OSV
Published 2026-04-13
Updated 2026-08-12
Modified 2026-07-24

Affected Packages

Software From version Fixed in
helm
helm.sh/helm/v4

Similar Threats

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