CVE-2026-77076 n8n before 1.123.69 Credential Leak via GraphQL Node Error
Authenticated users can retrieve decrypted credential secrets from stored execution data when GraphQL requests fail due to improper error handling.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-77076?
CVE-2026-77076 is a high-severity vulnerability in N8n N8n, published on 20 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-209
Which versions are affected by CVE-2026-77076?
It affects 1 product.
Products include N8n N8n.
How do I fix CVE-2026-77076?
Upgrade to a fixed version.
Is CVE-2026-77076 being exploited?
There is no known exploitation of CVE-2026-77076 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-8329-w544-9mx3, GHSA-9fqj-7wc5-cwhx, MINI-qj23-989f-qh2h.