CVE-2026-126383

n8n before 1.123.89 NoSQL Injection via MongoDB Node Update Key

Published Nov 13, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains a NoSQL injection vulnerability in the MongoDB node's Update and Find And Replace operations due to insufficient validation of the update key value taken from incoming items. Attackers who can supply untrusted input, such as a webhook body, to a workflow using these operations can make the node match and overwrite unintended documents or insert new documents in the MongoDB database.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n8n-io

n8n

unaffected

Version	Status	Constraints
`0`	affected	< 1.123.89
`1.123.89`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`2.46.0`	affected	< 2.46.1
`2.46.1`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`2.0.0`	affected	< 2.45.5
`2.45.5`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`3.0.0`	affected	< 3.0.1
`3.0.1`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.385% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/n8n-io/n8n/security/advisories/GHSA-4v22-g448-h4rg
https://www.vulncheck.com/advisories/n8n-before-1.123.89-nosql-injection-via-mongodb-node-update-key

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains a NoSQL injection vulnerability in the MongoDB node's Update and Find And Replace operations due to insufficient validation of the update key value taken from incoming items. Attackers who can supply untrusted input, such as a webhook body, to a workflow using these operations can make the node match and overwrite unintended documents or insert new documents in the MongoDB database.
Title		n8n before 1.123.89 NoSQL Injection via MongoDB Node Update Key
First Time appeared		N8n N8n n8n
Weaknesses		CWE-943
CPEs		cpe:2.3:a:n8n:n8n::::::::
Vendors & Products		N8n N8n n8n
References		https://github.com/n8n-io/n8n/security/advisories/GHSA-4v22-g448-h4rg https://www.vulncheck.com/advisories/n8n-before-1.123.89-nosql-injection-via-mongodb-node-update-key
Metrics		cvssV3_1 `{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H'}`