CVE-2023-36188: LangChain remote code execution in PALChain Python exec method

CVE-2023-36188 · Severity: critical · CVSS 9.8 · Published 2023-07-06

LangChain, a popular framework for building applications with large language models, is vulnerable to a critical security flaw. An attacker can remotely execute malicious code on the system running the software by exploiting how it handles certain Python execution parameters. This could lead to a full system takeover, data theft, or disruption of services.

Technologies: langchain (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2023-36188 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-36188 being exploited in the wild.
How severe is CVE-2023-36188?
Critical severity, with a CVSS score of 9.8, published 6 July 2023.
Which products and versions are affected?
langchain (PyPI) < 0.0.247, ECOSYSTEM:introduced=0,fixed=0.0.247.
Is there a fix for CVE-2023-36188?
Yes. langchain (PyPI): upgrade to 0.0.247 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2023-36188 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2023-36188?
Check whether you run langchain (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 0.0.247 or later
    pip install "langchain>=0.0.247"

Technical details

A remote code execution (RCE) vulnerability exists in LangChain due to improper neutralization of special elements used in downstream components (CWE-74). The flaw is located within the PALChain parameter of the Python exec method, where externally-influenced input is insufficiently sanitized before being executed. A remote, unauthenticated attacker can exploit this by providing crafted input that triggers arbitrary command execution on the host system. The vulnerability is addressed in version 0.0.247.

Affected products

  • langchain-ai langchain < 0.0.247

Identifiers

  • CVE-2023-36188
  • GHSA-57fc-8q82-gfp3
  • PYSEC-2023-109

Timeline

  • 2023-07-06: advisory
  • 2023-07-06: disclosed
  • 2023-07-06: patched

References

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