CVE-2026-86993: n8n: Log Streaming Event Destinations Decrypt Generic-Auth Credentials Without Ownership Check

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-08 · updated 2026-09-10
Weakness: CWE-862

Description

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, a Log Streaming event destination could reference a generic HTTP credential and decrypt whichever credential ID it named without an ownership check. A user with a custom global role carrying Log Streaming scopes could select a credential belonging to another project and send its decrypted secret to an attacker-controlled endpoint. The affected authorization boundary is packages/cli/src/modules/log-streaming.ee/destinations/destination-credentials-access.ts and the credential:read scope. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

Affected products

n8n-io n8n: before 1.123.76; from 2.0.0 before 2.37.7; from 2.38.0 before 2.38.2 — fixed in 1.123.76, 2.37.7, 2.38.2

How to fix

Upgrade to a fixed version: n8n-io n8n 1.123.76, 2.37.7, 2.38.2. Check the vendor advisory for mitigations.

References

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