Critical severity9.1NVD Advisory· Published Jun 22, 2026· Updated Jun 24, 2026
CVE-2026-56348
CVE-2026-56348
Description
n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with credentials to unauthorized hosts, exfiltrating sensitive authentication data.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | < 2.20.0 | 2.20.0 |
Affected products
1Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-3875-8gcx-7v46ghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-3875-8gcx-7v46nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-56348ghsaADVISORY
- www.vulncheck.com/advisories/n8n-credential-exfiltration-via-allowed-http-request-domains-bypass-in-dynamic-node-parameters-endpointnvdThird Party AdvisoryWEB
News mentions
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