CVE-2026-56348Network attack vector

Credential exfiltration via destination allowlist bypass

Published Jun 22, 2026 · Updated Jun 22, 2026

SSRF in n8n before 2.20.0 allows remote authenticated users to exfiltrate accessible credentials through a crafted API request. The POST /rest/dynamic-node-parameters/options endpoint accepts a caller-controlled destination and sends credential-bearing HTTP requests without enforcing Allowed HTTP Request Domains. Exploitation requires authentication and access to the targeted credential, and disclosure is limited to credentials available to that account.

CVSS severity5.3
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in n8n before 2.20.0 allows remote authenticated users to exfiltrate accessible credentials through a crafted API request. The POST /rest/dynamic-node-parameters/options endpoint accepts a caller-controlled destination and sends credential-bearing HTTP requests without enforcing Allowed HTTP Request Domains. Exploitation requires authentication and access to the targeted credential, and disclosure is limited to credentials available to that account.

The record

CVE
CVE-2026-56348
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-918, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 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 <2.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <2.20.0

Published CVSS scores

5.3n8nCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L

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-918Server-Side Request Forgery (SSRF)
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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