CVE-2026-54309 Details
n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP transport mode, the MCP endpoint accepts session initialization and tool invocation requests without any authentication. Any network-reachable client, or any website visited by the user, can establish an MCP session and invoke browser-control tools. Where the n8n AI Browser Bridge extension is installed and a browser connection is active, an unauthenticated caller can access browser-control capabilities including navigation, JavaScript evaluation, and cookie and storage access against the user's real browser profile. This issue only affects instances where @n8n/mcp-browser is run with the HTTP transport (--transport http). This vulnerability is fixed in 2.25.7 and 2.26.2.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-54309
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.4 Probability of exploitation activity being observed over the next 30 days (32nd percentile)
CVSS score for CVE-2026-54309
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
10 Critical
Products affected by CVE-2026-54309
N8n 1.105.3
N8n 1.105.4
N8n 1.106.3
N8n 1.107.0
N8n 1.107.2
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-54309 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 5,868 30.59%
DE 3,525 18.38%
FR 847 4.42%
GB 787 4.10%
SG 736 3.84%
VN 644 3.36%
IN 623 3.25%
CN 581 3.03%
NL 489 2.55%
BR 478 2.49%

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CVE-2026-54309 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 14,210 92.42%
Telecommunications 954 6.20%
Education 99 0.64%
Media/Entertainment 22 0.14%
Business Services 16 0.10%
Retail 16 0.10%
Engineering 15 0.10%
Government/Politics 14 0.09%
Consumer Goods 12 0.08%
Finance 4 0.03%

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