CVE-2026-77075: Improper Control of Generation of Code ('Code Injection') in n8n-io n8n
Description
n8n versions before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 have an expression injection vulnerability in the resource-locator field used for link preview rendering. This flaw allows an authenticated user to inject malicious JavaScript expressions that are evaluated in the context of other users when they open the affected node in the editor, resulting in cross-user script execution.
CVSS v4.0
Score 8.4high
Affected software
n8n-io
n8n
n8n-io
n8n
n8n-io
n8n
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-77075 is an expression injection vulnerability in n8n's resource-locator field link preview rendering. The editor directly inserts the stored field value into the node type's URL template without validating expression syntax. An authenticated user can exploit this by storing a malicious value that executes JavaScript in the session of another user who opens the node, leading to cross-user script execution. This affects n8n versions prior to 1.123.69, all 2.x versions before 2.33.4, and 2.34.x versions before 2.34.1.
Potential Impact
An authenticated user can inject malicious expressions that execute JavaScript in the context of other users' authenticated sessions when they open the affected node in the editor. This cross-user script execution can lead to unauthorized actions or data exposure within the application session of the victim user.
Mitigation Recommendations
Upgrade n8n to version 1.123.69 or later, 2.33.4 or later for 2.x versions, or 2.34.1 or later for 2.34.x versions to apply the official fix. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-20T10:51:39.784Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a86e706acd9273b498befb4
Added to database: 08/20/2026, 11:37:42 UTC
Last enriched: 09/11/2026, 01:47:24 UTC
Last updated: 10/05/2026, 06:48:18 UTC
Views: 55
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