一、 漏洞 CVE-2025-6985 基础信息
漏洞信息
                                        # LangChain XXE 漏洞

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漏洞标题
XXE Vulnerability in langchain-ai/langchain
来源：美国国家漏洞数据库 NVD
漏洞描述信息
The HTMLSectionSplitter class in langchain-text-splitters version 0.3.8 is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing. This vulnerability arises because the class allows the use of arbitrary XSLT stylesheets, which are parsed using lxml.etree.parse() and lxml.etree.XSLT() without any hardening measures. In lxml versions up to 4.9.x, external entities are resolved by default, allowing attackers to read arbitrary local files or perform outbound HTTP(S) fetches. In lxml versions 5.0 and above, while entity expansion is disabled, the XSLT document() function can still read any URI unless XSLTAccessControl is applied. This vulnerability allows remote attackers to gain read-only access to any file the LangChain process can reach, including sensitive files such as SSH keys, environment files, source code, or cloud metadata. No authentication, special privileges, or user interaction are required, and the issue is exploitable in default deployments that enable custom XSLT.
来源：美国国家漏洞数据库 NVD
CVSS信息
N/A
来源：美国国家漏洞数据库 NVD
漏洞类别
XML外部实体引用的不恰当限制(XXE)
来源：美国国家漏洞数据库 NVD
二、漏洞 CVE-2025-6985 的公开POC
# POC 描述 源链接 神龙链接
三、漏洞 CVE-2025-6985 的情报信息
四、漏洞 CVE-2025-6985 的评论

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