Medium severity · published Jun 23, 2026
CVE-2026-54301
n8n: Same-Origin XSS in Respond to Webhook Node
5.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
< 1.123.55; >= 2.0.0-rc.0, < 2.25.7; >= 2.26.0, < 2.26.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54301
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54301
Mitigation
https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm
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