CVE-2026-118649

High

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.

SeverityHigh

CVSS8.3

Exploit probability—

ProductN8n

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-1321Prototype pollution

How to fix

Update

n8n-io n8n2.44.1, 2.43.5 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	2.44.0 ≤ v < 2.44.1, v < 2.43.5	2.44.1, 2.43.5

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