🛡️ CVE-2025-68664
🔴 CVSS 9.3 — Critical ⚠️ Exploit Public CWE-502 NVD
9.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CWE CWE-502
Public Exploit ⚠️ Yes
Source NVD
Published 2025-12-23
Updated 2026-06-15
Modified 2026-01-13

Affected Packages

Software From version Fixed in
langchain-core 1.0.0 1.2.5

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