CVE-2026-54311

published 2026-06-23

CVE-2026-54311: 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…

Priority P3 49 high 7.7 CVSS 3.1

AV N AC L PR L UI N S C C H I N A N

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
n8n-io	n8n	< 2.25.7	2.25.7
n8n-io	n8n	—	—
n8n	n8n	< 2.25.7	2.25.7
n8n	n8n	>= 0 < 2.25.7	2.25.7
n8n	n8n	>= 2.26.0 < 2.26.2	2.26.2
n8n	n8n	>= 2.26.0 < 2.26.2	2.26.2

CVSS provenance

nvd v3.1 7.7 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

nvd v4.0 6.0 MEDIUM 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

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CWE-488