CVE-2026-77075: Improper Control of Generation of Code ('Code Injection') in n8n-io n8n
n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contain an expression injection vulnerability in resource-locator field link preview rendering. The editor spliced the field's stored value directly into the node type's URL template without checking for expression syntax. An authenticated member can store a malicious value so that when another user opens the affected node in the editor, the injected expression is evaluated as JavaScript in the victim's authenticated session (cross-user script execution).
AI Analysis
Technical Summary
CVE-2026-77075 is an expression injection vulnerability in n8n's resource-locator field link preview rendering. The editor inserts the stored field value directly into the node type's URL template without validating expression syntax. An authenticated user can store a malicious expression that executes as JavaScript in the session of another user who opens the node in the editor, resulting in cross-user script execution. This affects n8n versions prior to 1.123.69, 2.x prior to 2.33.4, and 2.34.x prior to 2.34.1.
Potential Impact
An authenticated user can inject malicious JavaScript expressions that execute 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 victim's session. The vulnerability has a high CVSS 4.0 score of 8.4, indicating significant risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions to trusted users only and avoid opening nodes from untrusted users in the editor.
CVE-2026-77075: Improper Control of Generation of Code ('Code Injection') in n8n-io n8n
Description
n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contain an expression injection vulnerability in resource-locator field link preview rendering. The editor spliced the field's stored value directly into the node type's URL template without checking for expression syntax. An authenticated member can store a malicious value so that when another user opens the affected node in the editor, the injected expression is evaluated as JavaScript in the victim's authenticated session (cross-user script execution).
CVSS v4.0
Score 8.4high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
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 inserts the stored field value directly into the node type's URL template without validating expression syntax. An authenticated user can store a malicious expression that executes as JavaScript in the session of another user who opens the node in the editor, resulting in cross-user script execution. This affects n8n versions prior to 1.123.69, 2.x prior to 2.33.4, and 2.34.x prior to 2.34.1.
Potential Impact
An authenticated user can inject malicious JavaScript expressions that execute 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 victim's session. The vulnerability has a high CVSS 4.0 score of 8.4, indicating significant risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions to trusted users only and avoid opening nodes from untrusted users in the editor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-20T10:51:39.784Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a86e706acd9273b498befb4
Added to database: 08/20/2026, 11:37:42 UTC
Last enriched: 08/20/2026, 11:52:54 UTC
Last updated: 08/20/2026, 19:38:54 UTC
Views: 6
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.