Detections
Analytics

SCA: security update for n8n (GHSA-qfc3-hm4j-7q77)

medium Tenable Cloud Security Plugin ID 439262

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-33749)

Solution

Update the n8n library and its related packages to version 1.123.27 or later.

See Also

https://github.com/advisories/GHSA-qfc3-hm4j-7q77

Plugin Details

Severity: Medium

ID: 439262

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 3/26/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.39

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-33749

CVSS v3

Risk Factor: Critical

Base Score: 9

Temporal Score: 7.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 2.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/26/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-33749

cwe: CWE-79