51/100 CVSS 9.9 🔴 CVE ANALYSISPublished: June 16, 2026

n8n: Cross-Tenant Credential Takeover via Dynamic Credentials EE Endpoints

## Impact Three EE endpoints used by the Dynamic Credentials feature accepted any authenticated n8n session without performing per-resource ownership or scope checks on the target workflow or credential. An authenticated user with no project membership or credential sharing relationship could enumerate credential identifiers, names, and types refer...

9.9

CVSS Score

MEDIUM

Threat Level

Priority /100

TBD

Exploited ITW

Monitor

CISA Status

Sources

🔵

HIGH-PRIORITY SECURITY ADVISORY — Priority Score: 51/100

CVSS 9.9 MEDIUM. SENTINEL APEX recommends immediate patch evaluation. Intelligence from 1 confirmed source(s).

📋 Executive Summary

⚡ Analyst Assessment — SENTINEL APEX v4.0

CYBERDUDEBIVASH SENTINEL APEX has confirmed a MEDIUM-tier threat intelligence signal for CVE-2026-54305 affecting npm n8n. Composite threat score: 51/100. Intelligence corroborated across 1 source(s): github_advisories. CVSS base score: 9.9. Exploitation probability assessed as HIGH based on vulnerability characteristics.

Intelligence sources: github_advisories

⚠️ Business Impact Analysis

⚠️ Complete system compromise possible — treat as active incident
⚠️ Remote code execution — full server takeover without authentication possible
⚠️ Privilege escalation — local attacker can become SYSTEM/root
⚠️ Data exfiltration risk — customer and sensitive data at risk

🔗 Attack Chain Analysis

Step-by-step attack chain based on observed TTPs and vulnerability characteristics:

#	Phase	Attacker Action	MITRE
1	Reconnaissance	Attacker identifies exposed n8n instances via Shodan, Censys, or targeted scanning	`TA0043`
2	Initial Access	Exploitation of CVE-2026-54305 in npm n8n	`T1190`
3	Execution	Remote code execution achieved — attacker runs arbitrary commands on target system	`T1203`
4	Privilege Escalation	Local privilege escalation to SYSTEM/root for full control	`T1068`
5	Persistence	Backdoor, scheduled task, or new admin account created for persistent access	`T1053`
6	Command & Control	Attacker establishes persistent C2 channel using HTTPS or DNS tunneling	`T1071`
7	Impact / Objectives	Intellectual property theft, espionage, cryptomining, or preparation for future attack stage	`T1657`

⚠ Deep Dive Analysis

This critical vulnerability in npm n8n (CVSS 9.9) represents a significant attack surface. SENTINEL APEX assesses exploitation to be technically feasible with moderate effort. Organizations running n8n in internet-facing or privileged positions face immediate risk.

SENTINEL APEX URGENCY: MAXIMUM. Score: 51/100 MEDIUM. Patch before exploitation activity begins.

🎯 MITRE ATT&CK Mapping

Category	Mapping
Primary Tactic	ML Attack Staging
Primary Technique	AML.T0040 — ML Attack Staging
Sub-Technique	AML.T0000 — AI/ML System Enumeration
Weakness (CWE)	CWE-200
Intel Type	🔴 CVE ANALYSIS
Source(s)	github_advisories

🔴 CVE Reference

CVE ID	Reference	Score
CVE-2026-54305	NVD →	9.9
CVE-2026-54305	NVD →	9.9

🔍 Detection Rules — Sigma (SIEM)

Deploy to Splunk, Elastic, Microsoft Sentinel, or QRadar. SOC Pro subscribers receive pre-compiled SIEM-native query packs updated with each pipeline run.

Sigma YAMLtitle: CVE-2026-54305 Exploitation Attempt — npm n8n
id: c173c95c56cf0bab-c5fc
status: experimental
description: Detects exploitation of CVE-2026-54305 in npm n8n. Priority: MEDIUM. Score: 51/100
author: CYBERDUDEBIVASH SENTINEL APEX v4.0 (bivash@cyberdudebivash.com)
date: 2026-06-17
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-54305
    - https://blog.cyberdudebivash.in/
tags:
    - attack.initial_access
    - attack.t1190
    - cve-2026-54305
    - cve-2026-54305
logsource:
    category: webserver
detection:
    keywords:
        - 'CVE-2026-54305'
        - 'CVE-2026-54305'
        - 'cve-2026-54305'
    condition: keywords
falsepositives:
    - Security scanners
level: critical

📡 Detection Rules — YARA (Endpoint)

Deploy to endpoint detection platforms. Enterprise subscribers receive tuned, FP-validated YARA rule packs.

YARArule CVE_2026_54305_Exploitation {
    meta:
        description = "Detects artifacts related to CVE-2026-54305 exploitation in npm n8n"
        author      = "CYBERDUDEBIVASH SENTINEL APEX v4.0"
        date        = "2026-06-17"
        severity    = "CRITICAL"
        cvss        = "9.9"
        priority    = "51/100"
        threat_level = "MEDIUM"
        reference   = "https://nvd.nist.gov/vuln/detail/CVE-2026-54305"
    strings:
        $id_str  = "CVE-2026-54305" ascii nocase
        $product = "n8n" ascii nocase wide
    condition:
        any of them
}

🛡️ SOC Response Playbook

1IMMEDIATE (0-1hr): Identify all instances of n8n in your environment via CMDB/asset inventory
2IMMEDIATE (0-1hr): Apply vendor patch — no maintenance window exception for MEDIUM threats
3IMMEDIATE (1-2hr): If no patch available: implement WAF rules, ACLs, or network-level compensating controls
4SHORT-TERM (2-4hr): Deploy Sigma detection rule to SIEM — validate alert generation in test environment
5SHORT-TERM (4-8hr): Review logs for exploitation indicators (anomalous n8n requests, error spikes)
6SHORT-TERM (8-24hr): Hunt for post-exploitation: new admin accounts, scheduled tasks, lateral movement
7MONITOR: Subscribe to npm security advisories for patch updates
8ONGOING: Track SENTINEL APEX intelligence feed for follow-on campaigns targeting n8n

📎 Intelligence References

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Related Resources — SENTINEL APEX

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⚡ CYBERDUDEBIVASH SENTINEL APEX v4.0

Intelligence report generated by CYBERDUDEBIVASH SENTINEL APEX v4.0
Report ID: SENTINEL-CVE-2026-54305-2026-06-17 | Priority: 51/100 MEDIUM | Sources: 1
© 2026 CYBERDUDEBIVASH PRIVATE LIMITED
Republication requires written attribution to CYBERDUDEBIVASH SENTINEL APEX

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