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.
Metrics
CVSS 3.1 4.7/10
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| langchain-ai | langchain-ai/langchain | >= unspecified, < 0.2.5 |
| langchain | langchain | < * |
References
- https://github.com/langchain-ai/langchain/commit/73c42306745b0831aa6fe7fe4eeb70d2c2d87a82
- https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918caeExploit, Third Party Advisory
- https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918caeExploit, Third Party Advisory
Timeline
- Published
- Jun 6, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Modified