CVE-2025-68664
9.3 · CRITICALOverview
CVE-2025-68664 is a critical-severity vulnerability affecting langchain langchain_core. It was published on December 23, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.
Remediation
Check the references section for vendor advisories and patches from langchain. Update langchain_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| langchain | langchain_core | >= 0, < 0.3.81 | Affected |
References
Frequently Asked Questions
What is CVE-2025-68664?
CVE-2025-68664 is a critical-severity vulnerability affecting langchain langchain_core. It was published on December 23, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).
How severe is CVE-2025-68664?
This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-68664?
Check the references section for vendor advisories and patches from langchain. Update langchain_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-68664?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-68664 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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