CVE-2026-33751— n8n Vulnerable to LDAP Filter Injection in LDAP Node

n8n Vulnerable to LDAP Filter Injection in LDAP Node

n8n is an open source workflow automation platform. Prior to versions 1.123.27, 2.13.3, and 2.14.1, a flaw in the LDAP node's filter escape logic allowed LDAP metacharacters to pass through unescaped when user-controlled input was interpolated into LDAP search filters. In workflows where external user input is passed via expressions into the LDAP node's search parameters, an attacker could manipulate the constructed filter to retrieve unintended LDAP records or bypass authentication checks implemented in the workflow. Exploitation requires a specific workflow configuration. The LDAP node must be used with user-controlled input passed via expressions (e.g., from a form or webhook). The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Limit workflow creation and editing permissions to fully trusted users only, disable the LDAP node by adding `n8n-nodes-base.ldap` to the `NODES_EXCLUDE` environment variable, and/or avoid passing unvalidated external user input into LDAP node search parameters via expressions. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

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LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)

n8n 注入漏洞

n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.27之前版本、2.13.3之前版本和2.14.1之前版本存在注入漏洞，该漏洞源于LDAP节点过滤器转义逻辑存在缺陷，可能导致攻击者操纵过滤器以检索非预期的LDAP记录或绕过身份验证检查。

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