CVE-2025-55199 | Helm Charts with Specific JSON Schema Values Can Cause Memory Exhaustion

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.

Published: 2025-08-14 Last update: 2025-08-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-55199 is rated Low Risk (34.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.31%). 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-2025-55199

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 2026-06-15 0.07% 0.31% +0.24%
2 2026-06-09 0.03% 0.07% +0.04%
3 2025-08-14 — 0.03% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-55199

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-2025-55199

GitHub Security Advisory for CVE-2025-55199

GHSA-9h84-qmv7-982p · Severity: medium · Ecosystem: go — Helm Charts with Specific JSON Schema Values Can Cause Memory Exhaustion

OS Trackers for CVE-2025-55199

vendor priority summary link
alpine — CVE-2025-55199: 1 source package rows (helm); 26 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 26. https://security.alpinelinux.org/vuln/CVE-2025-55199
redhat medium — https://access.redhat.com/security/cve/CVE-2025-55199
suse medium — https://www.suse.com/security/cve/CVE-2025-55199/

Affected software / configurations for CVE-2025-55199

Vendor Product Version Raw CPE
helm helm < 3.18.5 cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*

References for CVE-2025-55199

cvelogic Threat Intelligence