High severity · published Oct 28, 2026
CVE-2026-118649
n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables
New
8.3
CVSS
–
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
2.44.0 before 2.44.1; before 2.43.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-118649
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-118649
vendor-advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73
third-party-advisory
https://www.vulncheck.com/advisories/n8n-before-2.43.5-and-2.44.1-authorization-bypass-via-crafted-workflow-id-in-data-tables
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