Vulnerability DatabaseCVE-2026-118646
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CVE-2026-118646
Published:October 28, 2026
Updated:October 30, 2026
n8n before 1.123.85, 2.43.5, and 2.44.1 contains a regular expression denial of service vulnerability that allows authenticated members to block the event loop via crafted glob patterns. Attackers who can create and run workflows can submit a wildcard-heavy File(s) Selector pattern causing exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.
Affected Packages
https://github.com/n8n-io/n8n.git (GITHUB):
Affected version(s) >=n8n@2.0.0 <n8n@2.43.5
Fix Suggestion:
Update to version n8n@2.43.5
https://github.com/n8n-io/n8n.git (GITHUB):
Affected version(s) >=n8n@1.23.0 <n8n@1.123.85
Fix Suggestion:
Update to version n8n@1.123.85
https://github.com/n8n-io/n8n.git (GITHUB):
Affected version(s) =n8n@2.44.0 <n8n@2.44.1
Fix Suggestion:
Update to version n8n@2.44.1
n8n-nodes-base (NPM):
Affected version(s) =2.44.0 <2.44.1
Fix Suggestion:
Update to version 2.44.1
n8n-nodes-base (NPM):
Affected version(s) >=1.23.0 <1.121.55
Fix Suggestion:
Update to version 1.121.55
n8n (NPM):
Affected version(s) >=1.23.0 <1.123.85
Fix Suggestion:
Update to version 1.123.85
n8n (NPM):
Affected version(s) =2.44.0 <2.44.1
Fix Suggestion:
Update to version 2.44.1
n8n-nodes-base (NPM):
Affected version(s) >=2.0.0 <2.43.3
Fix Suggestion:
Update to version 2.43.3
n8n (NPM):
Affected version(s) >=2.0.0-rc.0 <2.43.5
Fix Suggestion:
Update to version 2.43.5
Related Resources (3)
https://github.com/n8n-io/n8n/security/advisories/GHSA-m7gv-mpg5-7c9v
https://www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-redos-via-read-write-files-node
https://nvd.nist.gov/vuln/detail/CVE-2026-118646
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Regular Expression Complexity
CWE-1333
EPSS
Base Score:
0.25