CVE-2026-25631Network attack vector

Credential exfiltration via wildcard hostname mismatch

Published Feb 6, 2026 · Updated Feb 6, 2026

Improper domain validation in n8n before 1.121.0 allows remote authenticated users to exfiltrate credentials through HTTP Request nodes. The credential-domain check accepts a wildcard match for an unintended hostname rather than requiring the hostname to fall beneath the allowed domain. Exposure requires a credential with a wildcard Allowed domains pattern and permission to create or modify a workflow; the consequence is disclosure of that credential to an unintended request destination.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper domain validation in n8n before 1.121.0 allows remote authenticated users to exfiltrate credentials through HTTP Request nodes. The credential-domain check accepts a wildcard match for an unintended hostname rather than requiring the hostname to fall beneath the allowed domain. Exposure requires a credential with a wildcard Allowed domains pattern and permission to create or modify a workflow; the consequence is disclosure of that credential to an unintended request destination.

The record

CVE
CVE-2026-25631
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-522, CWE-20, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 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=< 1.121.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.121.0

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
CWE-20Improper Input Validation
T1555Credentials from Password Stores

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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