CVE-2026-33749 Details
n8n is an open source workflow automation platform. Prior to versions 1.123.27, 2.13.3, and 2.14.1, an authenticated user with permission to create or modify workflows could craft a workflow that produces an HTML binary data object without a filename. The `/rest/binary-data` endpoint served such responses inline on the n8n origin without `Content-Disposition` or `Content-Security-Policy` headers, allowing the HTML to render in the browser with full same-origin JavaScript access. By sending the resulting URL to a higher-privileged user, an attacker could execute JavaScript in the victim's authenticated session, enabling exfiltration of workflows and credentials, modification of workflows, or privilege escalation to admin. The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Limit workflow creation and editing permissions to fully trusted users only, and/or restrict network access to the n8n instance to prevent untrusted users from accessing binary data URLs. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
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Exploit prediction scoring system (EPSS) score for CVE-2026-33749
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%).
0.04 Probability of exploitation activity being observed over the next 30 days (11th percentile)
CVSS score for CVE-2026-33749
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.
9 Critical
Products affected by CVE-2026-33749
N8n 0.183.0
N8n 1.100.1
N8n 1.101.1
N8n 1.101.2
N8n 1.102.3
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-2026-33749 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 4,193 30.62%
DE 2,382 17.39%
FR 642 4.69%
SG 574 4.19%
GB 493 3.60%
CN 459 3.35%
VN 438 3.20%
IN 434 3.17%
RU 390 2.85%
NL 334 2.44%

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CVE-2026-33749 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 9,939 91.42%
Telecommunications 779 7.17%
Education 59 0.54%
Retail 26 0.24%
Business Services 11 0.10%
Government/Politics 11 0.10%
Media/Entertainment 9 0.08%
Consumer Goods 6 0.06%
Engineering 6 0.06%
Finance 4 0.04%

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