CVE-2026-59254Network attack vector

External-secret disclosure via unrestricted expression resolution

Published Jul 15, 2026 · Updated Jul 15, 2026

Information disclosure in n8n before 2.28.1 allows remote authenticated users to read external secrets through workflow node expressions. The workflow expression resolver expands external-secret references outside the credentials scope without enforcing the caller's explicit secrets-access permission. Project editor access and a configured external secrets provider are required, and the bounded consequence is plaintext disclosure of secrets available to the instance.

CVSS severity6.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in n8n before 2.28.1 allows remote authenticated users to read external secrets through workflow node expressions. The workflow expression resolver expands external-secret references outside the credentials scope without enforcing the caller's explicit secrets-access permission. Project editor access and a configured external secrets provider are required, and the bounded consequence is plaintext disclosure of secrets available to the instance.

The record

CVE
CVE-2026-59254
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-639, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=0 <2.27.4
  2. Affected versionversion=0 <2.28.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <2.27.4; version=0 <2.28.1

Published CVSS scores

6.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/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 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-639Authorization Bypass Through User-Controlled Key
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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