CVE-2025-65106
November 21, 2025
LangChain is a framework for building agents and LLM-powered applications. From versions 0.3.79 and prior and 1.0.0 to 1.0.6, a template injection vulnerability exists in LangChain's prompt template system that allows attackers to access Python object internals through template syntax. This vulnerability affects applications that accept untrusted template strings (not just template variables) in ChatPromptTemplate and related prompt template classes. This issue has been patched in versions 0.3.80 and 1.0.7.
Affected Packages
https://github.com/langchain-ai/langchain.git (GITHUB):
Affected version(s) >=langchain-core==0.1.47 <langchain-core==0.3.80Fix Suggestion:
Update to version langchain-core==0.3.80https://github.com/langchain-ai/langchain.git (GITHUB):
Affected version(s) >=langchain-core==1.0.0 <langchain-core==1.0.7Fix Suggestion:
Update to version langchain-core==1.0.7langchain-core (PYTHON):
Affected version(s) >=0.0.1 <0.3.80Fix Suggestion:
Update to version 0.3.80langchain-core (PYTHON):
Affected version(s) >=1.0.0 <1.0.7Fix Suggestion:
Update to version 1.0.7Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements Used in a Template Engine
EPSS
Base Score:
0.09
