Improper Neutralization of Input Used for LLM Prompting Affecting @n8n/n8n-nodes-langchain package, versions <2.10.0
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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- published27 Feb 2026
- disclosed26 Feb 2026
- creditakirilov
Introduced: 26 Feb 2026
CVE-2026-56349 (opens in a new tab)How to fix?
Upgrade @n8n/n8n-nodes-langchain to version 2.10.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Neutralization of Input Used for LLM Prompting via the Guardrail node. An attacker can modify workflow input to circumvent intended restrictions by crafting specific input values.
Workaround
This vulnerability can be mitigated by limiting access to trusted users and reviewing the practical impact of guardrail bypasses in your use case, adjusting workflows accordingly.