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Fencer Vulns
medium 6.5

CVE-2025-55198 json

Helm May Panic Due To Incorrect YAML Content

published 2025-08-13 14 mo ago modified 2026-09-10 1 mo ago also BIT-helm-2025-55198 , EUVD-2025-24646 , GHSA-f9f8-9pmf-xv68 , GO-2025-3888

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, when parsing Chart.yaml and index.yaml files, an improper validation of type error can lead to a panic. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring YAML files are formatted as Helm expects prior to processing them with Helm.

Patch / fix

  • go helm.sh/helm/v3 3.18.5
  • bitnami helm 3.18.5
  • helm helm 3.18.5
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250818T190335-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2025:15469-1

  • helm CBL-Mariner 2.0 3.14.2-9

azure linux advisories AZL-66315

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2025-55198 updated cvss 6.5

helm.sh/helm/v3: Helm YAML Parsing Panic Vulnerability

  • Red Hat Deployment Validation Operator dvo/deployment-validation-rhel8-operator Red Hat Migration Toolkit for Applications 7 mta/mta-cli-rhel9 Red Hat Multicluster Engine for Kubernetes multicluster-engine/work-rhel8, multicluster-engine/work-rhel9, multicluster-engine/placement-rhel8, multicluster-engine/placement-rhel9, multicluster-engine/registration-rhel8, multicluster-engine/registration-rhel9, +16 more
    affected: workaround, no fix available “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-agent-rhel9, multicluster-globalhub/multicluster-globalhub-manager-rhel9, multicluster-globalhub/multicluster-globalhub-rhel9-operator, multicluster-globalhub/multicluster-globalhub-operator-bundle
    affected: workaround, no fix available, no fix planned “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat OpenShift Service Mesh 2 openshift-service-mesh/pilot-rhel8, openshift-service-mesh/proxyv2-rhel8, openshift-service-mesh/proxyv2-rhel9, openshift-service-mesh/istio-cni-rhel8
    affected: workaround, no fix planned “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-cni-rhel9, openshift-service-mesh/istio-pilot-rhel9, openshift-service-mesh/istio-proxyv2-rhel9, openshift-service-mesh/istio-rhel9-operator, openshift-service-mesh/istio-must-gather-rhel9, openshift-service-mesh/istio-sail-operator-bundle, +1 more Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-search-v2-rhel9, rhacm2/multiclusterhub-rhel9, rhacm2/multicloud-integrations-rhel9, rhacm2/acm-volsync-addon-controller-rhel9, rhacm2/multicluster-operators-channel-rhel9, rhacm2/multicluster-operators-subscription-rhel9, +2 more
    affected: workaround, no fix available “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-central-db-rhel8, advanced-cluster-security/rhacs-scanner-v4-rhel8, advanced-cluster-security/rhacs-scanner-v4-db-rhel8
    affected: workaround, no fix planned “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat Build of Kueue kueue/kueue-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-kueue-controller-rhel8, rhoai/odh-kueue-controller-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-console, openshift4/cnf-tests-rhel9, openshift4/ose-helm-operator, openshift4/ose-ansible-operator, openshift4/ose-olm-rukpak-rhel8, openshift4/ose-olm-rukpak-rhel9, +14 more Red Hat Openshift Data Foundation 4 odf4/odf-csi-addons-sidecar-rhel9, odf4/odf-csi-addons-rhel9-operator
    affected: workaround, no fix available “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat OpenShift Dev Spaces devspaces/udi-rhel9, devspaces/traefik-rhel9, devspaces/dashboard-rhel9, devspaces/configbump-rhel9, devspaces/imagepuller-rhel9, devspaces/devspaces-rhel9-operator, +2 more Red Hat OpenShift GitOps openshift-gitops-1/dex-rhel8, openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9, openshift-gitops-1/gitops-rhel8, openshift-gitops-1/must-gather-rhel8, openshift-gitops-1/argocd-agent-rhel8, +4 more Red Hat Trusted Application Pipeline rhtap-cli/rhtap-cli-rhel9
    affected: workaround, no fix planned “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.”
  • Red Hat OpenShift Container Platform 4.20 openshift4 openshift-enterprise-console-container-v4.20.0-202511250912.p2.ga7d3608.assembly.stream.el9
    fixed: vendor fix “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.” RHSA-2025:22257
show 2 more
  • Red Hat OpenShift Container Platform 4.21 openshift4 1770188884
    fixed: vendor fix “To mitigate this flaw, ensure YAML files are formatted as Helm expects prior to processing them with Helm.” RHSA-2026:2129
  • Red Hat OpenShift Container Platform 4.20 openshift4 v4.20.0-202511250912.p2.g019abe0.assembly.stream.el9, openshift4 v4.20.0-202511250912.p2.g0bbafe2.assembly.stream.el9, openshift4 v4.20.0-202511250912.p2.g184a960.assembly.stream.el9, openshift4 v4.20.0-202511250912.p2.g21f405c.assembly.stream.el9, openshift4 v4.20.0-202511250912.p2.g234e218.assembly.stream.el9, openshift4 v4.20.0-202511250912.p2.g276696c.assembly.stream.el9, +183 more Red Hat OpenShift Container Platform 4.21 openshift4 1769725137, openshift4 1769725144, openshift4 1769725145, openshift4 1769725150, openshift4 1769725153, openshift4 1769725155, +177 more
    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
14 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go helm.sh/helm/v3
<3.18.5
3.18.5
bitnami helm
<3.18.5
3.18.5
go helm.sh/helm
all versions
 no fix listed

Affected products

  • helm helm

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

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.