Helm vulnerable to information disclosure via getHostByName Function (CVE-2023-25165) | HOL Guard CVE

Medium · CVSS 4.3CVE-2023-25165GHSA-PWCW-6F5G-GXF8

Helm vulnerable to information disclosure via getHostByName Function

Answer in brief

CVE-2023-25165 records a Medium severity (CVSS 4.3) vulnerability in Helm vulnerable to information disclosure via getHostByName Function. The current sources do not mark it as known exploited. The current feed maps helm.sh/helm/v3 (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 8, 2023Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Aug 7, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps helm.sh/helm/v3 (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
helm.sh/helm/v3go	>=3.0.0 <3.11.1	3.11.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for helm.sh/helm/v3.
Review the reported fix. Update helm.sh/helm/v3 to 3.11.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 8, 2023
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Aug 7, 2026

Sources and claim methodology

Upstream source description

A Helm contributor discovered an information disclosure vulnerability using the `getHostByName` template function. ### Impact `getHostByName` is a Helm template function introduced in Helm v3. The function is able to accept a hostname and return an IP address for that hostname. To get the IP address the function performs a DNS lookup. The DNS lookup happens when used with `helm install|upgrade|template` or when the Helm SDK is used to render a chart. Information passed into the chart can be disclosed to the DNS servers used to lookup the IP address. For example, a malicious chart could inject `getHostByName` into a chart in order to disclose values to a malicious DNS server. ### Patches The issue has been fixed in Helm 3.11.1. ### Workarounds Prior to using a chart with Helm verify the `getHostByName` function is not being used in a template to disclose any information you do not want passed to DNS servers. ### For more information Helm's security policy is spelled out in detail in our [SECURITY](https://github.com/helm/community/blob/master/SECURITY.md) document. ### Credits Disclosed by Philipp Stehle at SAP.

Quoted source text, attributed separately from HOL analysis.