Is CVE-2023-39659 actively exploited?

No active exploitation of CVE-2023-39659 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39659 be exploited remotely?

Yes. CVE-2023-39659 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-39659?

CVE-2023-39659 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-39659

CRITICAL

CVE-2023-39659

CWE-74Published: August 15, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue in langchain langchain-ai v.0.0.232 and before allows a remote attacker to execute arbitrary code via a crafted script to the PythonAstREPLTool._run component.

NVD Source

Risk Analysis

LangChain is susceptible to remote code execution when processing crafted scripts within the PythonAstREPLTool component. This critical vulnerability is remotely exploitable without authentication and carries a CVSS score of 9.8.

There is no known public exploit for this vulnerability, and it is not tracked in the CISA KEV database.

Recommended Action

Update LangChain to a version beyond 0.0.232. Sanitize all inputs before passing them to tool components.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39659 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.