How severe is CVE-2026-54303?

CVE-2026-54303 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-2026-54303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-54303?

CVE-2026-54303 affects N8n. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-54303?

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

Does CVE-2026-54303 have an EU (EUVD) identifier?

Yes. CVE-2026-54303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38460.

When was CVE-2026-54303 published?

CVE-2026-54303 was published on 2026-06-23 and last updated on 2026-06-25.

CVE-2026-54303

CVE-2026-54303 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: 6.8
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38460
Weakness: CWE-79
Affected product: N8n
Published: 2026-06-23
Last modified: 2026-06-25

Description

n8n is an open source workflow automation platform. Prior to 2.24.0, an endpoint in the Meta and Microsoft Teams trigger nodes reflects a query parameter into the HTTP response without sanitization or Content-Security-Policy headers, enabling reflected XSS in the n8n origin when a logged-in user visits a crafted URL. This vulnerability is fixed in 2.24.0.

Frequently asked questions

What is CVE-2026-54303?: n8n is an open source workflow automation platform. Prior to 2.24.0, an endpoint in the Meta and Microsoft Teams trigger nodes reflects a query parameter into the HTTP response without sanitization or Content-Security-Policy headers, enabling reflected XSS in the n8n origin when a logged-in user visits a crafted URL. This vulnerability is fixed in 2.24.0.
How severe is CVE-2026-54303?: CVE-2026-54303 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-2026-54303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-54303?: CVE-2026-54303 affects N8n. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-54303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-54303 have an EU (EUVD) identifier?: Yes. CVE-2026-54303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38460.
When was CVE-2026-54303 published?: CVE-2026-54303 was published on 2026-06-23 and last updated on 2026-06-25.

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-h86q-fx34-gfjr

Affected products (1)

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

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