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Fencer Vulns
medium 4.4

CVE-2026-35206 json

Helm Chart extraction output directory collapse via `Chart.yaml` name dot-segment

published 2026-04-09 7 mo ago modified 2026-09-10 1 mo ago also BIT-helm-2026-35206 , EUVD-2026-21100 , GHSA-hr2v-4r36-88hr , GO-2026-5435

cvss
4.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

Helm is a package manager for Charts for Kubernetes. In Helm versions <=3.20.1 and <=4.1.3, a specially crafted Chart will cause helm pull --untar [chart URL | repo/chartname] to write the Chart's contents to the immediate output directory (as defaulted to the current working directory; or as given by the --destination and --untardir flags), rather than the expected output directory suffixed by the chart's name. This vulnerability is fixed in 3.20.2 and 4.1.4.

Patch / fix

  • go helm.sh/helm/v4 4.1.4
  • go helm.sh/helm/v3 3.20.2
  • bitnami helm 3.20.2, 4.1.4
  • helm helm 3.20.2, 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
  • helm SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.20.2-160000.1.1
  • govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260727T201416-160000.1.1
  • helm SLE Module for Package Hub 15 SP7, SLE Module for Containers 15 SP7, SLE Micro 5.5 3.20.2-150000.1.71.2

suse advisories SUSE-SU-2026:24282-1SUSE-SU-2026:23973-1SUSE-SU-2026:23984-1SUSE-SU-2026:21434-1SUSE-SU-2026:21461-1SUSE-SU-2026:23216-1

  • 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
  • helm3 openSUSE Tumbleweed 3.20.2-1.1

opensuse advisories openSUSE-SU-2026:21983-1openSUSE-SU-2026:21551-1openSUSE-SU-2026:10538-1openSUSE-SU-2026:10532-1

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-2026-35206 updated cvss 4.4

github.com/helm/helm: Helm: Files written to unexpected directory via specially crafted Chart

  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/multiclusterhub-rhel9
    affected: no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-operator-rhel9
    affected: no fix available “Fix deferred”
  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/work-rhel9, multicluster-engine/placement-rhel9, multicluster-engine/registration-rhel9, multicluster-engine/addon-manager-rhel9, multicluster-engine/multicloud-manager-rhel9, multicluster-engine/registration-operator-rhel9, +2 more Red Hat OpenShift AI (RHOAI) rhoai/odh-ogx-module-operator-rhel9
    under investigation
  • Red Hat Helm CLI 4.1 helm-cli 4.1.4
    fixed: vendor fix RHSA-2026:26441
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/backplane-rhel9-operator 1782476869
    fixed: vendor fix RHSA-2026:30650
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/multicloud-integrations-rhel9 1782256081
    fixed: vendor fix RHSA-2026:30651
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/hive-rhel9 1782327523, multicluster-engine/work-rhel9 1782159773, multicluster-engine/discovery-rhel9 1782158169, multicluster-engine/placement-rhel9 1782160009, multicluster-engine/console-mce-rhel9 1782157085, multicluster-engine/must-gather-rhel9 1782158798, +20 more
    not affected: vulnerable code not present
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-governance-policy-addon-controller-rhel9
    not affected: vulnerable code cannot be controlled by adversary
show 1 more
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/thanos-rhel9 1782465412, rhacm2/acm-cli-rhel9 1782157113, rhacm2/console-rhel9 1782157514, rhacm2/prometheus-rhel9 1782374537, rhacm2/acm-grafana-rhel9 1782383730, rhacm2/acm-search-v2-rhel9 1782316482, +37 more Red Hat Advanced Cluster Security 4 rhacs-eng/release-main, rhacs-eng/release-roxctl, rhacs-eng/release-operator, rhacs-eng/release-scanner-v4
    not affected: vulnerable code not present

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
partial
Assessed
6 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/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 4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
go helm.sh/helm/v4
<4.1.4
4.1.4
go helm.sh/helm/v3
<3.20.2
3.20.2
bitnami helm
<3.20.2
>=4.0.0, <4.1.4
3.20.2
4.1.4

Affected products

  • helm helm

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.