LangChain core vulnerability allows prompt injection and data exposure

Security Affairs

December 27, 2025 at 6:20 PM

Overview

A serious vulnerability has been found in LangChain Core, a key Python package used for developing applications that utilize large language models (LLMs). This flaw, identified as CVE-2025-68664 and assigned a CVSS score of 9.3, could enable attackers to perform prompt injection attacks, which may lead to the theft of sensitive data and manipulation of LLM responses. Organizations using LangChain Core for their applications are at risk, as this vulnerability allows malicious actors to exploit the package to access confidential information. It's critical for developers and companies utilizing this software to take immediate action to secure their systems and protect user data from potential breaches.

Key Takeaways

Affected Systems: LangChain Core (langchain-core), Python applications built on LangChain ecosystem
Action Required: Update LangChain Core to the latest version that addresses this vulnerability.
Timeline: Newly disclosed

Original Article Summary

A critical flaw in LangChain Core could allow attackers to steal sensitive secrets and manipulate LLM responses via prompt injection. LangChain Core (langchain-core) is a key Python package in the LangChain ecosystem that provides core interfaces and model-agnostic tools for building LLM-based applications. A critical vulnerability, tracked as CVE-2025-68664 (CVSS score of 9.3), affects the […]

Impact

LangChain Core (langchain-core), Python applications built on LangChain ecosystem

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Update LangChain Core to the latest version that addresses this vulnerability. Review and harden input handling to prevent prompt injection attacks.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Exploit, Vulnerability, and 1 more.

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