XMLOutputParser Vulnerability in LangChain Could Lead to Availability Compromise

CVE-2024-1455

What is CVE-2024-1455?

A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation. By nesting multiple layers of entities within an XML document, an attacker can cause the XML parser to consume excessive CPU and memory resources, leading to a denial of service (DoS).

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