CVE-2024-1455: LangChain XMLOutputParser vulnerable to XXE

# CVE-2024-1455: LangChain XMLOutputParser vulnerable to XXE

https://gcdradar.vercel.app/incidents/cve-2024-1455-langchain-xmloutputparser-vulnerable-to-xxe · AIR-2024-0080 · closed 2024-03-26

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2024-03-26
- AI role: Attack on AI
- Products: langchain
- CVE ids: CVE-2024-1455
- CVSS: 5.9

## Summary

LangChain's XMLOutputParser used standard library XML parsers vulnerable to XML entity expansion. Attackers could manipulate model outputs to compromise service availability.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2024-03-26: CVE-2024-1455: A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE)… (https://nvd.nist.gov/vuln/detail/CVE-2024-1455)
- 2024-03-26: CVE-2024-1455: LangChain's XMLOutputParser vulnerable to XML Entity Expansion (https://github.com/advisories/GHSA-q84m-rmw3-4382)

## Sources

- 2024-03-26 GitHub Advisory Database: CVE-2024-1455: LangChain's XMLOutputParser vulnerable to XML Entity Expansion https://github.com/advisories/GHSA-q84m-rmw3-4382
- 2024-03-26 NVD: CVE-2024-1455: A vulnerability in the langchain-ai/langchain repository allows for a Billion Laughs Attack, a type of XML External Entity (XXE)… https://nvd.nist.gov/vuln/detail/CVE-2024-1455

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.