InfoSecBulletin Cybersecurity for mankind
A total of 35 unique IP addresses have been identified exploitable via n8n instances (CVE: 2026-21858). BGD e-GOV CIRT advisory said, these IP address seems to be demonstrating active exploitation activity, indicating real-world targeting and compromise of vulnerable deployments.
Affected versons:
Microsoft Patches CVSS 10.0 Azure AI Foundry Vulnerability Allowing Privilege Escalation
AWS is unable to restore access to Bahrain, one UAE cloud data zone after war damage
Cisco Warns of Critical ISE 0-Day Flaw and Hackers Allegedly Selling Fortinet FortiGate 1-Day Flaw
Anthropic prepares “Claude Money” to analyze bank account and financial data
GhostCode Phishing Kit Evades Microsoft 365 MFA to Hijack Accounts in 78 Seconds
CISA Warns of Cisco Secure Email Gateway 0-Day Flaw Actively Exploited in Attacks
VPN flaw exposed 246,000 personnel records in japan
Hackers deploy Casbaneiro Trojan that activates on bank websites
German police read Signal, Telegram, WhatsApp messages without breaking encryption
Urgent Patch! cPanel, GitLab Flaws Expose Users to RCE, File and Credential Theft
• n8n self-hosted instances running versions 1.65.0 to below 1.120.0, This issue is fixed in
version 1.121.0 and later.
• Deployments accessible via the internet, especially those using webhooks for integrations
(e.g., with Slack, email services, or custom APIs).
Vulnerability Overview: CVE-2026-21858:
Product: n8n (Open-Source Workflow Automation Platform)
Severity: Critical (CVSS v3.1 Score: 10.0)
Affected Versions: All n8n versions prior to 1.121.0
Attack Vector: Network-based; no authentication required
Impact:
Exploiting this vulnerability allows an unauthenticated attacker to execute code remotely, access files, and steal sensitive information. In severe cases, it can compromise the entire system and enable further attacks on the network, greatly threatening infrastructure security.
BGD e-GOV CIRT urges to upgrade all n8n instances to v1.121.0 or later immediatly.
Related news:
BTRC NEIR face 2.4 million bot traffic in a minute
How Millions of Illegal IMEI Phones Infiltrated Bangladesh’s Networks
