Vulnerability · Published Apr 9, 2026 · Assigned by GitHub_M
CVE-2026-35205Helm's plugin verification fails open when .prov is missing, allowing unsigned plugin install
High 8.0
In plain English
A high-severity security flaw in helm from helm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.2%top 87.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | helm.sh/helm/v4 | 4.1.4 | GHSA-q5jf-9vfq-h4h7 |
| Go | helm.sh/helm/v4 | 4.1.4 | GO-2026-5566 |
Affected products (as reported)
Weakness: CWE-636, CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/helm/helm/security/advisories/GHSA-q5jf-9vfq-h4h7 x_refsource_CONFIRM
- https://github.com/helm/helm/commit/05fa37973dc9e42b76e1d2883494c87174b6074f x_refsource_MISC
- https://github.com/helm/helm/releases/tag/v4.1.4 x_refsource_MISC
- https://helm.sh/docs/topics/provenance/#the-provenance-file x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2026-35205 vdb-entry, x_refsource_REDHAT
- RHBZ#2456927 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35205.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:26441 vendor-advisory, x_refsource_REDHAT