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.

huntr.dev AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

huntr.dev CWE-400

huntr.dev https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918cae [No types assigned]