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Servers and applications

CVE-2026-126383

n8n before 1.123.89 NoSQL Injection via MongoDB Node Update Key

Severity
Medium 5.3
Published
13 Nov 2026
Last changed
13 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
1.123.89, 2.45.5, 2.46.1, 3.0.1
Weakness
NoSQL injection (CWE-943)
Attack
Over the network · Only under certain conditions · Needs a user account · No user action needed
CVSS 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
Sources
CVE Program

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.

From the CVE Program.

Affected software

SoftwareAffected versions
n8nServers and applications · cna:n8n-io|n8n
  • Every version before 1.123.89
  • From 2.0.0 before 2.45.5
  • From 2.46.0 before 2.46.1
  • From 3.0.0 before 3.0.1

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-126383