Command Injection in Renovate (CVE-2026-76231)
Summary
Command injection in Renovate (CVE-2026-76231). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
Summary
The user-provided string depName in the hermit manager is appended to the ./hermit install and ./hermit uninstall commands without proper sanitization.
Details
Adversaries can provide a maliciously named hermit dependency in conjunctions with a tweaked Renovate configuration file to trick Renovate to execute arbitrary code.
All values added to the packagesToInstall and packagesToUninstall variables in lib/modules/manager/hermit/artifacts.ts are not being escaped using the quote function from the shlex package.
This lack of proper sanitization for installing packages has been present in the product since the introduction of the hermit manager in version 32.135.0 (https://github.com/renovatebot/renovate/commit/b696abb3c2741508fbb4029f39153140a3722e1e), released on July 30 of 2022.
In version 37.199.1 (https://github.com/renovatebot/renovate/commit/eaec10d7c8afadbdd783ac47bd2adbfab444d6df) some use of the quote function from the shlex package was added, but not in a way that usefully prevented this arbitrary code injection vulnerability.
When support for replacements was introduced with version 37.214.4 (https://github.com/renovatebot/renovate/commit/41e8b99f86a6e2a56f80f7aa1a08a59d76f2358c), the same faulty approach was replicated for uninstalling packages.
PoC
- Create a git repo with the following content:…
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-2026-76231 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-2026-76231" on the vendor's site.
CVE-2026-76231 (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 disclosure@vulncheck.com
- web disclosure@vulncheck.com
- web disclosure@vulncheck.com
- web github.com
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web github.com