---
title: "Security digest: January 6, 2026"
url: https://erroneo.us/security/2026-01-06/
description: "January 6, 2026 vulnerability digest: 2 critical advisories (npm, Go). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2026-01-06
date_modified: 2026-01-06
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: January 6, 2026

2 critical advisories.

## Take stock

- npm: 1 critical advisory ( n8n ). Check with npm audit (or: npm ls <package>) .
- Go: 1 critical advisory ( github.com/kyverno/kyverno ). Check with govulncheck ./... .
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

None.

## Critical advisories

- [CVE-2026-21877](https://erroneo.us/security/cve/CVE-2026-21877/index.md) n8n Vulnerable to RCE via Arbitrary File Write — npm n8n >= 0.123.0, < 1.121.3 → 1.121.3
- [GHSA-gg4x-fgg2-h9w9](https://erroneo.us/security/ghsa/GHSA-gg4x-fgg2-h9w9/index.md) Bypassing Kyverno Policies via Double Policy Exceptions — Go github.com/kyverno/kyverno >= 1.9.0, <= 1.12.7 → 1.13.0

---
Source page: https://erroneo.us/security/2026-01-06/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt