CVE-2026-77075

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).

• CWE-94

• https://github.com/n8n-io/n8n/security/advisories/GHSA-fh4c-9rr2-p7qcMitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/n8n-before-expression-injection-via-resource-locatorThird Party Advisory

Published

Aug 20, 2026

Last Modified

Sep 1, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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