Medium severity5.4GHSA Advisory· Published Jun 23, 2026· Updated Jun 26, 2026
CVE-2026-54301
CVE-2026-54301
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | < 1.123.55 | 1.123.55 |
n8nnpm | >= 2.26.0, < 2.26.2 | 2.26.2 |
n8nnpm | >= 2.0.0-rc.0, < 2.25.7 | 2.25.7 |
Affected products
1Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-v733-mwr6-fgcmghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcmnvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-54301ghsaADVISORY
News mentions
1- n8n: 16 CVEs Disclosed in Single Batch — Credential Leaks, Prototype Pollution, and Sandbox EscapeVypr Intelligence · Jun 16, 2026