{"id":"PYSEC-2026-2561","summary":"Denial of service in langchain-community","details":"Denial of service in `SitemapLoader` Document Loader in the `langchain-community` package, affecting versions below 0.2.5. 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.","aliases":["CVE-2024-2965","GHSA-3hjh-jh2h-vrg6","PYSEC-2024-118"],"modified":"2026-07-13T16:43:37.506313050Z","published":"2026-07-13T14:36:32.210054Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-2965"},{"type":"WEB","url":"https://github.com/langchain-ai/langchain/pull/22903"},{"type":"WEB","url":"https://github.com/langchain-ai/langchain/commit/73c42306745b0831aa6fe7fe4eeb70d2c2d87a82"},{"type":"WEB","url":"https://github.com/langchain-ai/langchain/commit/9a877c7adbd06f90a2518152f65b562bd90487cc"},{"type":"PACKAGE","url":"https://github.com/langchain-ai/langchain"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/langchain/PYSEC-2024-118.yaml"},{"type":"WEB","url":"https://huntr.com/bounties/90b0776d-9fa6-4841-aac4-09fde5918cae"},{"type":"PACKAGE","url":"https://pypi.org/project/langchain-community"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-3hjh-jh2h-vrg6"}],"affected":[{"package":{"name":"langchain-community","ecosystem":"PyPI","purl":"pkg:pypi/langchain-community"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.5"}]}],"versions":["0.0.1","0.0.10","0.0.11","0.0.12","0.0.13","0.0.14","0.0.15","0.0.16","0.0.17","0.0.18","0.0.19","0.0.1rc1","0.0.1rc2","0.0.2","0.0.20","0.0.21","0.0.22","0.0.23","0.0.24","0.0.25","0.0.26","0.0.27","0.0.28","0.0.29","0.0.3","0.0.30","0.0.31","0.0.32","0.0.33","0.0.34","0.0.35","0.0.36","0.0.37","0.0.38","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","0.0.9","0.2.0","0.2.0rc1","0.2.1","0.2.2","0.2.3","0.2.4"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/langchain-community/PYSEC-2026-2561.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}