CVE-2026-42237Network attack vector

Database data theft and manipulation via unescaped identifiers

Published May 4, 2026 · Updated May 4, 2026

SQL injection in n8n before 1.123.32 and in 2.17.0 through 2.17.3 and 2.18.0 allows remote authenticated users to alter connected databases. Snowflake and legacy MySQL v1 nodes interpolate user-controlled table names, column names, and update keys into SQL without identifier escaping. Exploitation requires an affected node, low-privileged access, and external input reaching identifier fields through expressions; it allows reading, modifying, or deleting downstream data.

CVSS severity5.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in n8n before 1.123.32 and in 2.17.0 through 2.17.3 and 2.18.0 allows remote authenticated users to alter connected databases. Snowflake and legacy MySQL v1 nodes interpolate user-controlled table names, column names, and update keys into SQL without identifier escaping. Exploitation requires an affected node, low-privileged access, and external input reaching identifier fields through expressions; it allows reading, modifying, or deleting downstream data.

The record

CVE
CVE-2026-42237
Published
May 4, 2026
Updated
May 4, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.123.32
  2. Affected versionversion=>= 2.17.0, < 2.17.4
  3. Affected versionversion=>= 2.18.0, < 2.18.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.32; version=>= 2.17.0, < 2.17.4; version=>= 2.18.0, < 2.18.1

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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