CVE-2024-1455: A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Enti
Summary
CVE-2024-1455 is a vulnerability in the langchain-ai/langchain repository that allows a Billion Laughs Attack, a type of XML External Entity (XXE) exploitation where an attacker nests multiple layers of entities within an XML document to make the parser consume excessive CPU and memory resources, causing a denial of service (DoS, where a system becomes unavailable to legitimate users).
Solution / Mitigation
A patch is available at https://github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92a3
Vulnerability Details
5.9(medium)
EPSS: 0.1%
Classification
Affected Vendors
Related Issues
CVE-2024-27444: langchain_experimental (aka LangChain Experimental) in LangChain before 0.1.8 allows an attacker to bypass the CVE-2023-
CVE-2025-45150: Insecure permissions in LangChain-ChatGLM-Webui commit ef829 allows attackers to arbitrarily view and download sensitive
Original source: https://nvd.nist.gov/vuln/detail/CVE-2024-1455
First tracked: February 15, 2026 at 08:35 PM
Classified by LLM (prompt v3) · confidence: 95%