High 8.3Published Nov 21, 2025

CVE-2025-65106LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates

Updated under an hour ago (Oct 27, 2026, 3:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for langchain-ai langchain

Exploited in the last 30 days

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.

CVSS: 8.3 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-1336
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Nov 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langchain-ai langchain langchain_ai:langchain (from the name)	from 1.0.0, < 1.0.7; before 0.3.80	CNA record

References

References

https://github.com/langchain-ai/langchain/security/advisories/GHSA-6qv9-48xg-fc7f	x-refsource-confirm
https://github.com/langchain-ai/langchain/commit/c4b6ba254e1a49ed91f2e268e6484011c540542a	x-refsource-misc
https://github.com/langchain-ai/langchain/commit/fa7789d6c21222b85211755d822ef698d3b34e00	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.