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CVE-2025-32387

Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow

MEDIUM
6.5
CVSS Score
Published: April 9, 2025 at 10:28 PM UTC
Updated: June 17, 2026 at 09:11 AM UTC
1 product affected across 1 vendorHelm

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Helm· Helm
95%
v < 3.17.3
Affected range stops below 3.17.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/helm/helm/commit/d8ca55fc669645c10c0681d49723f4bb8c0b1ce7
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/helm/helm/security/advisories/GHSA-5xqw-8hwv-wg92

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121CWE-674

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