CVE-2026-118649

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.

Score

CVSS 4.0 8.7 High

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-28

Last modified

2026-10-28

Weaknesses

CWE-1321

Affected products

• N8n (N8n)

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73
• https://www.vulncheck.com/advisories/n8n-before-2.43.5-and-2.44.1-authorization-bypass-via-crafted-workflow-id-in-data-…