Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1xODRtLXJtdzMtNDM4Ms4AA6Si

LangChain's XMLOutputParser vulnerable to XML Entity Expansion

The XMLOutputParser in LangChain uses the etree module from the XML parser in the standard python library which has some XML vulnerabilities; see: https://docs.python.org/3/library/xml.html

This primarily affects users that combine an LLM (or agent) with the XMLOutputParser and expose the component via an endpoint on a web-service.

This would allow a malicious party to attempt to manipulate the LLM to produce a malicious payload for the parser that would compromise the availability of the service.

A successful attack is predicated on:

1. Usage of XMLOutputParser
2. Passing of malicious input into the XMLOutputParser either directly or by trying to manipulate an LLM to do so on the users behalf
3. Exposing the component via a web-service

Permalink: https://github.com/advisories/GHSA-q84m-rmw3-4382
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xODRtLXJtdzMtNDM4Ms4AA6Si
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 1 month ago
Updated: about 1 month ago

CVSS Score: 5.9
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-q84m-rmw3-4382, CVE-2024-1455
References:

• https://nvd.nist.gov/vuln/detail/CVE-2024-1455
• https://huntr.com/bounties/4353571f-c70d-4bfd-ac08-3a89cecb45b6
• https://github.com/langchain-ai/langchain/pull/17250
• https://github.com/langchain-ai/langchain/commit/727d5023ce88e18e3074ef620a98137d26ff92a3
• https://github.com/langchain-ai/langchain/pull/19653
• https://github.com/langchain-ai/langchain/pull/19660
• https://github.com/advisories/GHSA-q84m-rmw3-4382

Repository: https://github.com/langchain-ai/langchain
Blast Radius: 13.1

Affected Packages