Detections
Analytics
CVE-2025-68664
high
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.
References
https://thehackernews.com/2026/03/langchain-langgraph-flaws-expose-files.html
https://thehackernews.com/2025/12/critical-langchain-core-vulnerability.html
https://github.com/PhinehasNarh/cve-research
https://github.com/Johnnyzhou666/langgrinch-cve-2025-68664-analysis
https://github.com/sattyamjjain/agent-audit-kit
https://github.com/amlalabs/amla-sandbox
https://github.com/comerc/CVE-2025-68664
https://github.com/Ak-cybe/CVE-2025-68664-LangGrinch-PoC
https://github.com/felipepenha/github-advisory-local-db
https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm
https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5
https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81
https://github.com/langchain-ai/langchain/pull/34458
https://github.com/langchain-ai/langchain/pull/34455
https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6
https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8
Details
Published: 2025-12-23
Updated: 2026-01-13
Named Vulnerability: LangGrinchNamed Vulnerability: GHSA-c67j-w6g6-q2cm
Risk Information
CVSS v2
Base Score: 8.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N
Severity: High
CVSS v3
Base Score: 8.2
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Severity: High
EPSS
EPSS: 0.4293