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.
Metrics
Affected Vendors & Products
References
History
Fri, 21 Aug 2026 17:30:00 +0000
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ssvc
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Thu, 20 Aug 2026 11:45:00 +0000
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| 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. | |
| Title | n8n before 1.123.69 Credential Leak via GraphQL Node Error | |
| First Time appeared |
N8n
N8n n8n |
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| Weaknesses | CWE-209 | |
| CPEs | cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* | |
| Vendors & Products |
N8n
N8n n8n |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-21T16:43:12.650Z
Reserved: 2026-08-20T10:51:39.784Z
Link: CVE-2026-77076
Updated: 2026-08-21T16:43:06.687Z
Status : Received
Published: 2026-08-20T12:16:38.997
Modified: 2026-08-21T17:16:46.907
Link: CVE-2026-77076
No data.
OpenCVE Enrichment
Updated: 2026-08-21T13:02:06Z