How severe is CVE-2026-56348?

CVE-2026-56348 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2026-56348 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56348?

CVE-2026-56348 primarily affects N8n. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-56348?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-56348 have an EU (EUVD) identifier?

Yes. CVE-2026-56348 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38376.

When was CVE-2026-56348 published?

CVE-2026-56348 was published on 2026-06-22 and last updated on 2026-06-24.

CVE-2026-56348

CVE-2026-56348 is a critical-severity vulnerability in N8n with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 5.3
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38376
Weakness: CWE-918
Affected product: N8n
Published: 2026-06-22
Last modified: 2026-06-24

Description

n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with credentials to unauthorized hosts, exfiltrating sensitive authentication data.

Frequently asked questions

What is CVE-2026-56348?: n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with credentials to unauthorized hosts, exfiltrating sensitive authentication data.
How severe is CVE-2026-56348?: CVE-2026-56348 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2026-56348 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56348?: CVE-2026-56348 primarily affects N8n. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-56348?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-56348 have an EU (EUVD) identifier?: Yes. CVE-2026-56348 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38376.
When was CVE-2026-56348 published?: CVE-2026-56348 was published on 2026-06-22 and last updated on 2026-06-24.

References

Affected products (2)

cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*
cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*

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