n8n Node.js Package < 2.27.4 / 2.28.0 < 2.28.1 Account Takeover (CVE-2026-59208)

high Nessus Plugin ID 330282

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Synopsis

The n8n Node.js Package installed on the remote host is affected by an account takeover vulnerability.

Description

The version of the n8n Node.js Package installed on the remote host is prior to 2.27.4, or is 2.28.x prior to 2.28.1. It is, therefore, affected by an account takeover vulnerability:

- n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1. (CVE-2026-59208)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to n8n Node.js Package version 2.27.4, 2.28.1 or later.

Plugin Details

Severity: High

ID: 330282

File Name: n8n_nodejs_package_2_28_1.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 7/28/2026

Updated: 7/29/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7

Percentile: 98.23

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 4.9

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

CVSS Score Source: CVE-2026-59208

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

CVSS v4

Risk Factor: High

Base Score: 7.6

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/a:n8n:n8n

Required KB Items: Host/nodejs/modules/enumerated

Exploit Ease: No known exploits are available

Patch Publication Date: 6/24/2026

Vulnerability Publication Date: 6/24/2026

Reference Information

CVE: CVE-2026-59208

IAVB: 2026-B-0207

Detections

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