CVE-2026-77076

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

N8n

PublishedAug 20, 2026

First seenAug 20, 2026

Weakness typeCWE-209CWE-209

How to fix

Update

n8n n8n1.123.69, 2.33.4 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 1.123.69, 2.33.0 ≤ v < 2.33.4, 2.34.0	1.123.69, 2.33.4

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