CVE-2025-32387Network attack vector

Client crash via recursive JSON Schema references

Published Apr 9, 2025 · Updated Apr 10, 2025

Uncontrolled recursion in Helm before 3.17.3 allows remote attackers to crash the client by supplying a crafted chart JSON Schema. The chart schema parser follows a deeply nested chain of references without an effective recursion bound, exhausting the process stack. Exploitation requires a user or automated workflow to load the untrusted chart; the documented consequence is client termination, not data access or modification.

CVSS severity6.5
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in Helm before 3.17.3 allows remote attackers to crash the client by supplying a crafted chart JSON Schema. The chart schema parser follows a deeply nested chain of references without an effective recursion bound, exhausting the process stack. Exploitation requires a user or automated workflow to load the untrusted chart; the documented consequence is client termination, not data access or modification.

The record

CVE
CVE-2025-32387
Published
Apr 9, 2025
Updated
Apr 10, 2025
Vendor
The Helm Project
Product
Helm
Classifications
CWE-121, CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.17.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Helm Project · Helmversion=< 3.17.3

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-674Uncontrolled Recursion
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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