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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Langchain-ai
  • Langchain

No data.

No data.

References
Link Providers
https://github.com/langchain-ai/langchain/commit/c4b6ba254e1a49ed91f2e268e6484011c540542a cve-icon cve-icon cve-icon
https://github.com/langchain-ai/langchain/commit/fa7789d6c21222b85211755d822ef698d3b34e00 cve-icon cve-icon cve-icon
https://github.com/langchain-ai/langchain/security/advisories/GHSA-6qv9-48xg-fc7f cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-65106 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-65106 cve-icon
History

Wed, 26 Nov 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'}

threat_severity

Important

Mon, 24 Nov 2025 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Langchain-ai
Langchain-ai langchain
Vendors & Products Langchain-ai
Langchain-ai langchain

Fri, 21 Nov 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 21 Nov 2025 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates
Weaknesses CWE-1336
References
Metrics cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-11-21T21:43:02.461Z

Updated: 2025-11-21T21:53:19.566Z

Reserved: 2025-11-17T20:55:34.694Z

Link: CVE-2025-65106

cve-icon Vulnrichment

Updated: 2025-11-21T21:53:08.392Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-21T22:16:32.933

Modified: 2025-11-25T22:16:42.557

Link: CVE-2025-65106

cve-icon Redhat

Severity : Important

Publid Date: 2025-11-21T21:43:02Z

Links: CVE-2025-65106 - Bugzilla