# CVE-2026-77076

## Summary

- **CVE ID:** CVE-2026-77076
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-209
- **Published:** Aug 20, 2026
- **Last Modified:** Aug 21, 2026

## 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.

## Affected Products

- n8n-io — n8n (0)
- n8n-io — n8n (1.123.69)
- n8n-io — n8n (2.34.1)
- n8n-io — n8n (2.33.4)
- n8n-io — n8n (2.34.0)
- n8n-io — n8n (2.0.0)

## References

- [CNA](https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx)
- [CNA](https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node-error)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 20.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._