Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow
Priority LOW 29CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 10 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-121 and the CVSS impact.
Summary
Helm is a package manager for Charts for Kubernetes. A JSON Schema file within a chart can be crafted with a deeply nested chain of references, leading to parser recursion that can exceed the stack size limit and trigger a stack overflow. This issue has been resolved in Helm v3.17.3.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00501 43rd percentileScored 2026-11-07
Fix Partial helm (helm): 3.17.3helm.sh/helm/v3 (Go): 3.17.3Red Hat: 10 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| helm | helm | before 3.17.3 | 3.17.3 | Patch available | CNA |
| — | helm.sh/helm/v3 (Go) | before 3.17.3 | 3.17.3 | Patch available | GHSA-5xqw-8hwv-wg92 |
- helm Vendorhelm Affected before 3.17.3 Fixed in 3.17.3 Patch available CNA
- helm.sh/helm/v3 (Go) Vendor— Affected before 3.17.3 Fixed in 3.17.3 Patch available GHSA-5xqw-8hwv-wg92
Remediation
- Fix · CNA helm (helm) Fixed in 3.17.3
- Fix · GHSA-5xqw-8hwv-wg92 helm.sh/helm/v3 (Go) Fixed in 3.17.3 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Deployment Validation Operator | Affected | No fix yet: Fix deferred |
| Multicluster Global Hub | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 2 | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Application Pipeline | Affected | No fix yet: Fix deferred |
| cert-manager Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32387
- 2026-10-03 Alias added: GHSA-5xqw-8hwv-wg92
- 2026-10-27 Affected versions changed · Red Hat
References
More Helm vulnerabilities
- TI-2024-16848 Dependency management path traversal in helm CVSS 3.1MEDIUM 6.4
- TI-2026-45154 Helm Files.Lines Denial of Service via Empty Chart Files CVSS 4.0MEDIUM 5.3
- TI-2023-10627 getHostByName Function Information Disclosure CVSS 3.1MEDIUM 4.3
- TI-2019-15264 An issue was discovered in Cloud Native Computing Foundation (CNCF) Helm through 3.13.3. CVSS 3.1CRITICAL 9.1
- TI-2019-13497 In Helm 2.x before 2.15.2, commands that deal with loading a chart as a directory or… CVSS 3.1CRITICAL 9.8
- TI-2019-16052 Improper certificate validation in helm CVSS 3.0CRITICAL 9.8
Sources
- CVE-2025-32387 · CVE Program
- CVE-2025-32387 · NVD
- FIRST EPSS
- GHSA-5xqw-8hwv-wg92 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-32387 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences