User Impersonation Affecting @n8n/n8n-nodes-langchain package, versions >=2.7.0 <2.25.2>=2.26.0 <2.26.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-N8NN8NNODESLANGCHAIN-17748214
- published1 Jul 2026
- disclosed24 Jun 2026
- creditnkoorty, jjjutla
Introduced: 24 Jun 2026
CVE-2026-54308 (opens in a new tab)How to fix?
Upgrade @n8n/n8n-nodes-langchain to version 2.25.2, 2.26.1 or higher.
Overview
Affected versions of this package are vulnerable to User Impersonation via the MicrosoftAgent365Trigger node failing to validate inbound requests. An attacker can execute workflows with attacker-controlled data by submitting forged payloads to the webhook URL.