CVE-2026-35205 PUBLISHED

Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install

Assigner: GitHub_M
Reserved: 01.04.2026 Published: 09.04.2026 Updated: 09.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	helm
Product	helm
Versions	Version >= 4.0.0, < 4.1.4 is affected

References

https://github.com/helm/helm/security/advisories/GHSA-q5jf-9vfq-h4h7
https://github.com/helm/helm/commit/05fa37973dc9e42b76e1d2883494c87174b6074f
https://github.com/helm/helm/releases/tag/v4.1.4
https://helm.sh/docs/topics/provenance/#the-provenance-file

Problem Types

CWE-636: Not Failing Securely ('Failing Open') CWE