Auth bypass in N8n
CVE-2026-72774
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a credential authorization bypass in the HTTP Request node. An authenticated member with edit access to a shared workflow can reference another user's credential while specifying the credential type via an expression. Because the pre-execution permission check compares the unresolved expression instead of the resolved credential type, the ownership check is skipped and the credential is loaded at execution time, allowing the member to use or exfiltrate a credential they were not granted. Exploitation requires knowing the target credential's identifier.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- N8n — versions 2.32.0
- N8n-Io N8n — versions 0, 1.123.67, 2.32.1
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-6qc9-mqvw-jg7x (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-http-request-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-72774?
- CVE-2026-72774 is a medium-severity vulnerability in N8n, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-11.
- How severe is CVE-2026-72774?
- Medium severity. CVSS v3 base score is 6.5 out of 10.