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Fencer Vulns
high 8.0

CVE-2026-35205 json

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

published 2026-04-09 7 mo ago modified 2026-09-10 1 mo ago also BIT-helm-2026-35205 , EUVD-2026-20901 , GHSA-q5jf-9vfq-h4h7 , GO-2026-5566

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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.

Patch / fix

  • go helm.sh/helm/v4 4.1.4
  • bitnami helm 4.1.4
  • Red Hat Helm CLI 4.1 cli-4.1.4
  • helm Linux Micro 6.1 4.3.0-slfo.1.1_1.1
  • helm SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4.3.0-160000.1.1
  • govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260727T201416-160000.1.1

suse advisories SUSE-SU-2026:24282-1SUSE-SU-2026:23973-1SUSE-SU-2026:23984-1SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1

  • helm openSUSE Leap 16.0 4.3.0-160000.1.1
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260727T201416-160000.1.1
  • helm openSUSE Tumbleweed 4.1.4-2.1

opensuse advisories openSUSE-SU-2026:21983-1openSUSE-SU-2026:21551-1openSUSE-SU-2026:10538-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-35205 updated cvss 8.0

github.com/helm/helm: helm.sh/helm/v4: Helm: Arbitrary code execution due to insufficient plugin provenance verification

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-ogx-module-operator-rhel9
    affected: workaround, no fix available
  • Red Hat Helm CLI 4.1 helm-cli 4.1.4
    fixed: vendor fix RHSA-2026:26441

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.4 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
CISA ADP 3.1 8.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 8.4 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go helm.sh/helm/v4
>=4.0.0, <4.1.4
4.1.4
bitnami helm
>=4.0.0, <4.1.4
4.1.4

Affected products

  • helm helm
  • Red Hat Helm CLI 4.1

Classification

Weakness
  • CWE-636 Not Failing Securely
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.