CVE-2026-33751Network attack vector

LDAP record disclosure via unescaped filter metacharacters

Published Mar 25, 2026 · Updated Mar 25, 2026

LDAP injection in the LDAP node in n8n before 1.123.27, 2.0.0-rc.0 through 2.13.2, and 2.14.0 allows remote attackers to read LDAP records. The filter escape logic leaves LDAP metacharacters unescaped when expression-derived user input is interpolated into search filters, enabling filter manipulation. Exploitation requires a workflow that passes external input from a form, webhook, or similar source into LDAP search parameters; it exposes unintended records or bypasses workflow authentication checks.

CVSS severity6.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in the LDAP node in n8n before 1.123.27, 2.0.0-rc.0 through 2.13.2, and 2.14.0 allows remote attackers to read LDAP records. The filter escape logic leaves LDAP metacharacters unescaped when expression-derived user input is interpolated into search filters, enabling filter manipulation. Exploitation requires a workflow that passes external input from a form, webhook, or similar source into LDAP search parameters; it exposes unintended records or bypasses workflow authentication checks.

The record

CVE
CVE-2026-33751
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-90, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=< 1.123.27
  2. Affected versionversion=>= 2.0.0-rc.0, < 2.13.3
  3. Affected versionversion== 2.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

n8n · n8nversion=< 1.123.27; version=>= 2.0.0-rc.0, < 2.13.3; version== 2.14.0

Published CVSS scores

6.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N
4.8NISTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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