Command Injection in Renovate (CVE-2026-76229)
Summary
Command injection in Renovate (CVE-2026-76229). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
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
- Create a mock Helm repository. Have its
index.yamlendpoint return:
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
- Create a git repo with the following content:
renovate.json5:
{
$schema: "https://docs.renovatebot.com/renovate-schema.json",
postUpdateOptions: [
"kustomizeInflateHelmCharts",
]
}
kustomization.yaml:
kind: Kustomization
apiVersion: kustomize.config.k8s.io/v1beta1
helmCharts:
- name: "example || kill 1…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-76229 has been found in Renovate.
Successful exploitation can lead to full system takeover. CVSS score: 6.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Renovate CVE-2026-76229" on the vendor's site.
CVE-2026-76229 (Renovate) — CWE-77 / CVSS v3 6.7
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-77) exists in Renovate.
Check the vendor advisory for the affected versions of Renovate.
Severity: Medium (CVSS 6.7/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Renovate' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Renovate' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Renovateを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web disclosure@vulncheck.com
- web github.com
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web github.com