Vulnerability Description
n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n's standard error type. That error contains the live request's headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx
- https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node
FAQ
What is CVE-2026-77076?
CVE-2026-77076 is a documented vulnerability. n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the under...
How severe is CVE-2026-77076?
CVSS scoring is not yet available for CVE-2026-77076. Check NVD for updates.
Is there a patch for CVE-2026-77076?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.