# CVE-2026-54301 — n8n-io n8n

> As of 2026-06-24, CVE-2026-54301 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in n8n-io n8n, CVSS v4.0 7, EPSS 0.3% (30.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-54301 as of 2026-06-24; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-06-24

## 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.

The record classifies CVE-2026-54301 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 104 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 7 — High (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 30.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-23, last modified 2026-06-24

## Is CVE-2026-54301 being exploited?

It currently carries a trending score of 37 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [n8n-io](https://intel.threadlinqs.com/vendors/n8n-io): n8n

## How to fix CVE-2026-54301

No vendor patch reference has been recorded for CVE-2026-54301 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-54301

No threat campaign in the Threadlinqs corpus currently references CVE-2026-54301, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-06-26. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-54301
Full detection coverage and IOCs for threats exploiting CVE-2026-54301 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp