What’s Vulnerable › Vulnerabilities

CVE-2024-2965: Denial-of-Service in LangChain SitemapLoader in langchain-ai/langchain

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-06-06 · updated 2026-06-17
• Weakness: CWE-674

Description

A Denial-of-Service (DoS) vulnerability exists in the `SitemapLoader` class of the `langchain-ai/langchain` repository, affecting all versions. The `parse_sitemap` method, responsible for parsing sitemaps and extracting URLs, lacks a mechanism to prevent infinite recursion when a sitemap URL refers to the current sitemap itself. This oversight allows for the possibility of an infinite loop, leading to a crash by exceeding the maximum recursion depth in Python. This vulnerability can be exploited to occupy server socket/port resources and crash the Python process, impacting the availability of services relying on this functionality.

Affected products

• langchain-ai/langchain: before 0.2.5 — fixed in 0.2.5

How to fix

Upgrade to a fixed version: langchain-ai/langchain 0.2.5. Check the vendor advisory for mitigations.

References

• https://github.com/langchain-ai/langchain/commit/73c42306745b0831aa6fe7fe4eeb70d2c2d87a82
• https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918cae
• https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918cae

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