# CVE-2024-2965: PYSEC-2026-2561 - Denial of service in langchain-community

Source: https://junglewise.ai/threats/cve-2024-2965-langchain-sitemaploader-denial-of-service-via-infinite-recursion  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-13. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2024-2965 · Severity: low · CVSS 3.1 · Published 2026-07-13

LangChain is a popular framework for building AI applications with document loaders and parsers. The SitemapLoader component lacks protection against self-referential sitemaps, allowing an attacker to trigger infinite recursion that crashes the Python process, disrupting services that rely on this functionality.

Technologies: [langchain (PyPI)](https://junglewise.ai/threats/technologies/langchain), [langchain-community (PyPI)](https://junglewise.ai/threats/technologies/pypi-langchain-community). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-2965 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-2965 being exploited in the wild.

**How severe is CVE-2024-2965?** Low severity, with a CVSS score of 3.1, published 13 July 2026.

**Which products and versions are affected?** langchain (PyPI) ECOSYSTEM:introduced=0,fixed=0.2.5, GIT:introduced=0,fixed=73c42306745b0831aa6fe7fe4eeb70d2c2d87a82|ECOSYSTEM:introduced=0,fixed=0.2.5; langchain-community (PyPI) ECOSYSTEM:introduced=0,fixed=0.2.5.

**Is there a fix for CVE-2024-2965?** Yes. langchain (PyPI): upgrade to 0.2.5 or later; langchain-community (PyPI): upgrade to 0.2.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2024-2965 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2024-2965?** Check whether you run langchain (PyPI) or langchain-community (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- langchain (PyPI): upgrade to 0.2.5 or later

  ```sh
  pip install "langchain>=0.2.5"
  ```

- langchain-community (PyPI): upgrade to 0.2.5 or later

  ```sh
  pip install "langchain-community>=0.2.5"
  ```


## Technical details

The vulnerability exists in the parse_sitemap method of the SitemapLoader document loader in langchain-community, which fails to detect or prevent infinite recursion when a sitemap URL references itself. An attacker can craft a malicious sitemap that points to itself, causing the parser to enter an infinite loop and exhaust Python's recursion depth limit, resulting in a crash. The vulnerability is triggered when the loader processes the sitemap without depth restrictions or cycle detection. This affects all versions of langchain-community below 0.2.5 and langchain below 0.2.5, and has been patched by adding depth restrictions to sitemap parsing (CVE-2024-2965).

## Affected products

- LangChain langchain-community below 0.2.5
- LangChain langchain below 0.2.5

## Identifiers

- CVE-2024-2965
- GHSA-3hjh-jh2h-vrg6
- PYSEC-2024-118
- PYSEC-2026-2561

## Timeline

- 2024-06-06: disclosed: Vulnerability disclosed via GitHub Advisory GHSA-3hjh-jh2h-vrg6
- 2024-06-14: patched: Fix merged in PR #22903 restricting sitemap parsing depth

## References

- [https://github.com/langchain-ai/langchain/pull/22903](https://github.com/langchain-ai/langchain/pull/22903)

## Related threats

- [PYSEC-2026-1515 - Langchain Community Vulnerable to XML External Entity (XXE) Attacks](https://junglewise.ai/threats/cve-2025-6984-langchain-community-vulnerable-to-xml-external-entity-xxe-attacks)
- [PYSEC-2026-1507 - Langchain SQL Injection vulnerability](https://junglewise.ai/threats/cve-2024-8309-langchain-sql-injection-vulnerability)
- [PYSEC-2026-1514 - LangChain pickle deserialization of untrusted data](https://junglewise.ai/threats/cve-2024-5998-langchain-pickle-deserialization-of-untrusted-data)
- [PYSEC-2026-1516 - Server-Side Request Forgery in langchain-community.retrievers.web_research.WebResearchRetriever](https://junglewise.ai/threats/cve-2024-3095-server-side-request-forgery-in-langchain-community-retrievers-web)
- [PYSEC-2026-1510 - langchain vulnerable to path traversal](https://junglewise.ai/threats/cve-2024-3571-langchain-vulnerable-to-path-traversal)