CVE-2025-68664criticalCWE-502

CVE-2025-68664: critical vulnerability in langchain-ai langchain

LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

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60Vexday Risk Score

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ssvc Attendcvss 9.3epss 43%
from disclosure to weapon4 days
Published on NVDDec 23
1st PoC+4d
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Affected products
langchain-ai · langchain
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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