CVE-2026-54311 (GCVE-0-2026-54311)
Vulnerability from cvelistv5 – Published: 2026-06-23 15:41 – Updated: 2026-06-23 17:45
VLAI
EPSS
VEX
Title
n8n: Merge Node SQL Mode Prototype Pollution
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 17:45 UTC
CWE
- CWE-488 - Exposure of Data Element to Wrong Session
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
Impacted products
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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