n8n: Credential Exfiltration via Permission Bypass
Description
Impact
A member-level user with editor access to a shared workflow could reference credentials they do not own via specific public API endpoints. Credential ownership checks were only enforced partially leading to cross-user credential access.
This issue affects instances where workflow sharing is enabled and at least one workflow has been shared with a member-level user as an Editor.
Patches
The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict workflow sharing to fully trusted users only. - Audit shared workflows for unexpected credential references or recent modifications.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Credits: Momen Elkhouli
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | < 1.123.55 | 1.123.55 |
n8nnpm | >= 2.26.0, < 2.26.2 | 2.26.2 |
n8nnpm | >= 2.0.0-rc.0, < 2.25.7 | 2.25.7 |
Affected products
1Patches
Vulnerability mechanics
References
2News mentions
1- n8n: 16 CVEs Disclosed in Single Batch — Credential Leaks, Prototype Pollution, and Sandbox EscapeVypr Intelligence · Jun 16, 2026