CVEvulnerability

CVE-2025-68664

8.2 HIGH Published 2025-12-23 Modified 2026-10-19 Official page ↗
Status
Analyzed
Published
2025-12-23
Last modified
2026-10-19
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.3 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CVSS 3.1 ([email protected])
8.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Weaknesses
CWE-502

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.

Affected configurations

• langchain langchain core (< 0.3.81) • langchain langchain core (>= 1.0.0 < 1.2.5)

Related

Weakness · CWE (1)

  • CWE-502 Deserialization of Untrusted Data weakness

References