Dashboard / CVE-2026-54311

CVE-2026-54311

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 52/100
Published: 2026-06-23 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: Low
UI: None
S: X
AT: Present
VC: High
VI: None
VA: None

Description

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, an authenticated user with permission to create or modify workflows could pollute the sandbox used by the Merge node's SQL Query mode. Because the sandbox context was cached and reused across all workflow executions on the instance, prototype mutations introduced by one user's workflow persist into subsequent Merge SQL executions belonging to other users or projects. This allowed a low-privileged attacker to intercept workflow data processed by other users on the same instance. This issue only affects multi-user n8n instances where more than one user has permission to create and execute workflows containing the Merge node in SQL Query mode. This vulnerability is fixed in 2.25.7 and 2.26.2.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
n8n n8n < 2.25.7

References & Advisories (1)

Bug Bounty Relevance

52 / 100
✓ Network accessible
✓ No user interaction

CVSS Score

6.0 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.39%
Raw Score 0.003910
Percentile 33.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00391
2026-10-28
0.00391

Intelligence Sources

nvd ref →

External Links