CVE-2025-32387 | Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow

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.

Published: 2025-04-09 Last update: 2025-09-03 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-32387 is rated Low Risk (26/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-32387

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.08% 0.01% -0.07%
2 2025-11-18 0.03% 0.08% +0.04%
3 2025-04-10 — 0.03% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-32387

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2025-32387

GitHub Security Advisory for CVE-2025-32387

GHSA-5xqw-8hwv-wg92 · Severity: medium · Ecosystem: go — Helm Allows A Specially Crafted JSON Schema To Cause A Stack Overflow

OS Trackers for CVE-2025-32387

vendor priority summary link
alpine — CVE-2025-32387: 1 source package rows (helm); 14 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 14. https://security.alpinelinux.org/vuln/CVE-2025-32387
redhat medium — https://access.redhat.com/security/cve/CVE-2025-32387
suse medium — https://www.suse.com/security/cve/CVE-2025-32387/
ubuntu medium CVE-2025-32387 medium priority: Ubuntu including 1 source packages (helm), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): needs-triage 7, ignored 2. https://ubuntu.com/security/CVE-2025-32387

Affected software / configurations for CVE-2025-32387

Vendor Product Version Raw CPE
helm helm < 3.17.3 cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*

References for CVE-2025-32387

cvelogic Threat Intelligence