CVE-2026-85171: Insertion of Sensitive Information into Log File in n8n-io n8n
Description
n8n before 1.123.73, 2.35.4, and 2.36.2 contains a credential exposure vulnerability in the Strapi, SeaTable, and Mailcheck nodes. These nodes send their decrypted credentials to the authentication endpoint via the raw legacy HTTP helper outside any error handling, causing the plaintext secret to be persisted in execution error data. Any authenticated user can read the plaintext secret from their own execution through the REST API, bypassing the blank-value redaction enforced by the credentials API.
CVSS v4.0
Score 7.1high
Affected software
n8n-io
n8n
n8n-io
n8n
n8n-io
n8n
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85171 describes a credential exposure vulnerability in the n8n workflow automation tool affecting versions prior to 1.123.73, 2.35.4, and 2.36.2. The Strapi, SeaTable, and Mailcheck nodes send decrypted credentials to an authentication endpoint using a legacy HTTP helper that does not handle errors properly. This results in plaintext secrets being stored in execution error logs. Any authenticated user can retrieve these secrets from their own execution data through the REST API, circumventing the intended blank-value redaction enforced by the credentials API.
Potential Impact
The vulnerability allows any authenticated user to read plaintext credentials from their own execution logs via the REST API. This exposure of sensitive information can lead to unauthorized access to external services or systems that rely on these credentials. The issue affects confidentiality but does not require elevated privileges beyond authentication.
Mitigation Recommendations
A fix is available in n8n versions 1.123.73, 2.35.4, and 2.36.2. Users should upgrade to at least one of these versions to remediate the credential exposure vulnerability. Until patched, restrict access to authenticated users and monitor for unauthorized access to execution logs.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-03T11:05:09.078Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a995c08acd9273b49dbb6af
Added to database: 09/03/2026, 11:37:44 UTC
Last enriched: 09/17/2026, 02:02:28 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 100
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.