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CVE-2026-118649 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

n8n before 2.43.5 and 2.44.x before 2.44.1 accepts a client-supplied workflow ID and caches each workflow's owner project in memory by that ID, so a crafted ID such as __proto__ makes the Data Table project check match every project. An authenticated member who can create and run workflows can list, read, modify, and delete Data Table rows in all projects of the instance.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:8.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/n8n-before-2.43.5-and-2.44.1-authorization-bypass-via-crafted-workflow-id-in-data-tables	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1321	Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')	[email protected]

Affected Products

Product	Versions
n8n	< 2.43.5 (semver) < 2.44.1 (semver)
CPE cpe:2.3:a:n8n:n8n::::::node.js::* Remediation Upgrade: 2.43.5moderate effort Upgrade: 2.44.1moderate effort Mitigation:low effort Restrict n8n instance access to fully trusted users only. Mitigation:low effort Audit existing workflows for any whose stored ID is '__proto__' and remove them. Mitigation:low effort Disable the Data Tables module if it is not required.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]