CVE-2026-77076

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-20 12:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-01 19:44 UTC Last updatedMost recent change to the record

Details

Published

2026-08-20 12:16 UTC

Last modified

2026-09-01 19:44 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-209

Record status

Analyzed

Affected

• n8n < 1.123.69
• n8n < 2.33.4
• n8n 2.34.0

Attack profile CVSS 4.0 · 7.1

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

Low

User interaction

None

Confidentiality

High

Integrity

None

Availability

None