How severe is CVE-2026-54301?

CVE-2026-54301 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-54301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54301?

CVE-2026-54301 affects N8n. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54301?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-54301 have an EU (EUVD) identifier?

Yes. CVE-2026-54301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38475.

When was CVE-2026-54301 published?

CVE-2026-54301 was published on 2026-06-23 and last updated on 2026-06-26.

CVE-2026-54301

CVE-2026-54301 is a medium-severity vulnerability in N8n with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 7.0
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38475
Weakness: CWE-79
Affected product: N8n
Published: 2026-06-23
Last modified: 2026-06-26

Description

n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.

Frequently asked questions

What is CVE-2026-54301?: n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.
How severe is CVE-2026-54301?: CVE-2026-54301 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-54301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54301?: CVE-2026-54301 affects N8n. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54301?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-54301 have an EU (EUVD) identifier?: Yes. CVE-2026-54301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38475.
When was CVE-2026-54301 published?: CVE-2026-54301 was published on 2026-06-23 and last updated on 2026-06-26.

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm

Affected products (1)

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

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