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Full vulnerability report · 2025
CVE-2025-55199High confidence

Helm Charts with Specific JSON Schema Values Can Cause Memory Exhaustion

helm · helm

6.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2025-55199 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityhelm.sh/helm/v3: Helm Chart JSON Schema Denial of Service
97 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • dvo/deployment-validation-rhel8-operator as a component of Deployment Validation Operator
  • mta/mta-cli-rhel9 as a component of Migration Toolkit for Applications 7
  • multicluster-engine/addon-manager-rhel8 as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/addon-manager-rhel9 as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/backplane-rhel8-operator as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/backplane-rhel9-operator as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/cluster-proxy-rhel8 as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/cluster-proxy-rhel9 as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/hypershift-addon-rhel8-operator as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/hypershift-addon-rhel9-operator as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/managed-serviceaccount-rhel8 as a component of Multicluster Engine for Kubernetes
  • multicluster-engine/managed-serviceaccount-rhel9 as a component of Multicluster Engine for Kubernetes
Summary
A flaw was found in helm.sh/helm/v3. A maliciously crafted JSON Schema file can trigger excessive memory consumption during Helm Chart validation, leading to an out-of-memory (OOM) termination. A remote attacker, requiring user interaction to provide the crafted file, can trigger this condition. This issue results in an application level denial of service affecting the Helm process.
Remediation
For OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/ You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:7ca8870aa5e505f969aa26161594a3f99b65baf7d29bab8adaca0cade51b0bb6 (For s390x architecture) The image digest is sha256:b33dc753fbb59cc939496922a7f65b3eaf145214f5635c9824790a5bc7a0b5a2 (For ppc64le architecture) The image digest is sha256:46bd467d5cee3e80019ef25c8af7460dfee7e5ae376dd640b76251666eafc98a (For aarch64 architecture) The image digest is sha256:6d018f320d0ba0496fe3410470c2ea3c58e9d77a95fe0f64f3120bc1115f9bf1 All OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-24647

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, it is possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring all Helm charts that are being loaded into Helm do not have any reference of $ref pointing to /dev/zero.

What

Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, it is possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring all Helm charts that are being loaded into Helm do not have any reference of $ref pointing to /dev/zero.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Helm is a package manager for Charts for Kubernetes. Prior to version 3.18.5, it is possible to craft a JSON Schema file in a manner which could cause Helm to use all available memory and have an out of memory (OOM) termination. This issue has been resolved in Helm 3.18.5. A workaround involves ensuring all Helm charts that are being loaded into Helm do not have any reference of $ref pointing to /dev/zero.

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Allocation of Resources Without Limits or Throttling → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-770 ↗

CWE-770: Allocation of Resources Without Limits or Throttling. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-770
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2025-2727Red Hat OpenShift Container Platform: Mehrere Schwachstellen ermöglichen Denial of Service

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift Container Platform ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0218Multiples vulnérabilités dans les produits VMware

cord?id=CVE-2025-5244 Référence CVE CVE-2025-5245 https://www.cve.org/CVERecord?id=CVE-2025-5245 Référence CVE CVE-2025-52565 https://www.cve.org/CVERecord?id=CVE-2025-52565 Référence CVE CVE-2025-52881 https://www.cve.org/CVERecord?id=CVE-2025-52881 Référence CVE CVE-2025-53057 https://www.cve.org/CVERecord?id=CVE-2025-53057 Référence CVE CVE-2025-53066 https://www.cve.org/CVERecord?id=CVE-2025-53066 Référence CVE CVE-2025-53864 https://www.cve.org/CVERecord?id=CVE-2025-53864 Référence CVE CVE-2025-55163 https://www.cve.org/CVERecord?id=CVE-2025-55163 Référence CVE CVE-2025-55198 https://www.cve.org/CVERecord?id=CVE-2025-55198 Référence CVE CVE-2025-55199 https://www.cve.org/CVERecord?id=CVE-2025-55199 Référence CVE CVE-2025-58056 https://www.cve.org/CVERecord?id=CVE-2025-58056 Référence CVE CVE-2025-58057 https://www.cve.org/CVERecord?id=CVE-2025-58057 Référence CVE CVE-2025-58058 https://www.cve.org/CVERecord?id=CVE-2025-58058 Référence CVE CVE-2025-58181 https://www.cve.org/CVERecord?id=CVE-2025-58181 Référence CVE CVE-2025-58183 https://www.cve.org/CVERecord?id=CVE-2025-58183 Référence CVE CVE-2025-58185 https://www.cve.org/CVERecord?id=CVE-2025-58185 Référence CVE CVE-2025-58186 https://www.cve.org/CVERecord?id=CVE-2025-58186 Référence CVE CVE-2025-58187 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0112Multiples vulnérabilités dans les produits VMware

d?id=CVE-2025-48989 Référence CVE CVE-2025-52565 https://www.cve.org/CVERecord?id=CVE-2025-52565 Référence CVE CVE-2025-52881 https://www.cve.org/CVERecord?id=CVE-2025-52881 Référence CVE CVE-2025-53057 https://www.cve.org/CVERecord?id=CVE-2025-53057 Référence CVE CVE-2025-53066 https://www.cve.org/CVERecord?id=CVE-2025-53066 Référence CVE CVE-2025-53547 https://www.cve.org/CVERecord?id=CVE-2025-53547 Référence CVE CVE-2025-54388 https://www.cve.org/CVERecord?id=CVE-2025-54388 Référence CVE CVE-2025-54410 https://www.cve.org/CVERecord?id=CVE-2025-54410 Référence CVE CVE-2025-55198 https://www.cve.org/CVERecord?id=CVE-2025-55198 Référence CVE CVE-2025-55199 https://www.cve.org/CVERecord?id=CVE-2025-55199 Référence CVE CVE-2025-55752 https://www.cve.org/CVERecord?id=CVE-2025-55752 Référence CVE CVE-2025-55754 https://www.cve.org/CVERecord?id=CVE-2025-55754 Référence CVE CVE-2025-58058 https://www.cve.org/CVERecord?id=CVE-2025-58058 Référence CVE CVE-2025-58181 https://www.cve.org/CVERecord?id=CVE-2025-58181 Référence CVE CVE-2025-58183 https://www.cve.org/CVERecord?id=CVE-2025-58183 Référence CVE CVE-2025-58185 https://www.cve.org/CVERecord?id=CVE-2025-58185 Référence CVE CVE-2025-58186 https://www.cve.org/CVERecord?id=CVE-2025-58186 Référence CVE CVE-2025-58187 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1131Multiples vulnérabilités dans les produits IBM

ecord?id=CVE-2025-47913 Référence CVE CVE-2025-48734 https://www.cve.org/CVERecord?id=CVE-2025-48734 Référence CVE CVE-2025-50059 https://www.cve.org/CVERecord?id=CVE-2025-50059 Référence CVE CVE-2025-5187 https://www.cve.org/CVERecord?id=CVE-2025-5187 Référence CVE CVE-2025-53057 https://www.cve.org/CVERecord?id=CVE-2025-53057 Référence CVE CVE-2025-53066 https://www.cve.org/CVERecord?id=CVE-2025-53066 Référence CVE CVE-2025-5372 https://www.cve.org/CVERecord?id=CVE-2025-5372 Référence CVE CVE-2025-55182 https://www.cve.org/CVERecord?id=CVE-2025-55182 Référence CVE CVE-2025-55198 https://www.cve.org/CVERecord?id=CVE-2025-55198 Référence CVE CVE-2025-55199 https://www.cve.org/CVERecord?id=CVE-2025-55199 Référence CVE CVE-2025-58057 https://www.cve.org/CVERecord?id=CVE-2025-58057 Référence CVE CVE-2025-58187 https://www.cve.org/CVERecord?id=CVE-2025-58187 Référence CVE CVE-2025-58188 https://www.cve.org/CVERecord?id=CVE-2025-58188 Référence CVE CVE-2025-58754 https://www.cve.org/CVERecord?id=CVE-2025-58754 Référence CVE CVE-2025-5914 https://www.cve.org/CVERecord?id=CVE-2025-5914 Référence CVE CVE-2025-59250 https://www.cve.org/CVERecord?id=CVE-2025-59250 Référence CVE CVE-2025-59375 https://www.cve.org/CVERecord?id=CVE-2025-59375 Référence CVE CVE-2025-6020 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-012276Helm における制限またはスロットリング無しのリソースの割り当てに関する脆弱性

Helm には、制限またはスロットリング無しのリソースの割り当てに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
For OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/ You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:7ca8870aa5e505f969aa26161594a3f99b65baf7d29bab8adaca0cade51b0bb6 (For s390x architecture) The image digest is sha256:b33dc753fbb59cc939496922a7f65b3eaf145214f5635c9824790a5bc7a0b5a2 (For ppc64le architecture) The image digest is sha256:46bd467d5cee3e80019ef25c8af7460dfee7e5ae376dd640b76251666eafc98a (For aarch64 architecture) The image digest is sha256:6d018f320d0ba0496fe3410470c2ea3c58e9d77a95fe0f64f3120bc1115f9bf1 All OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 13 Aug 2025 · Last source change 14 Aug 2025, 14:50 UTC · CWE-770 · Allocation of Resources Without Limits or Throttling

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-24647
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2025-24647↗Vendor CSAF · Red Hat Product Security↗Patch or update reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2025-55199 · cve.blacktree.nl