CVE-2026-118649 n8n - Broken Access Control

n8n < 2.43.5 and 2.44.x < 2.44.1 contain a broken access control caused by accepting client-supplied workflow ID leading to prototype pollution in Data Table project checks, letting authenticated members with workflow creation and execution privileges access and modify all project Data Table rows.

CVSS base score 8.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-1321

Vendor fix

Update to version 2.43.5 or 2.44.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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