CVE-2024-1455: PYSEC-2026-1519 - LangChain's XMLOutputParser vulnerable to XML Entity Expansion

CVE-2024-1455 · Severity: low · CVSS 3 · Published 2026-07-07

LangChain's XMLOutputParser vulnerable to XML Entity Expansion

Technologies: langchain-core (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2024-1455 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2024-1455 being exploited in the wild.
How severe is CVE-2024-1455?
Low severity, with a CVSS score of 3, published 7 July 2026.
Which products and versions are affected?
langchain-core (PyPI) ECOSYSTEM:introduced=0,fixed=0.1.35.
Is there a fix for CVE-2024-1455?
Yes. langchain-core (PyPI): upgrade to 0.1.35 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2024-1455?
Check whether you run langchain-core (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-core (PyPI): upgrade to 0.1.35 or later
    pip install "langchain-core>=0.1.35"

Affected products

  • langchain-core (PyPI) ECOSYSTEM:introduced=0,fixed=0.1.35

Identifiers

  • CVE-2024-1455
  • GHSA-q84m-rmw3-4382
  • PYSEC-2026-1519

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