{"id":"CVE-2025-68665","revision":"f6dc469aa1a34020844da8903c0a1668","records":[{"revision":"f6dc469aa1a34020844da8903c0a1668","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68665","aliases":[],"title":"LangChain serialization injection vulnerability enables secret extraction","description":"LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. 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 @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3","state":0,"publishedAt":"2025-12-23T22:56:04.837+00:00","modifiedAt":"2025-12-24T14:38:40.268+00:00","affected":[{"ecosystem":"Vendor product","name":"langchainjs","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"langchain-ai\",\n                    \"product\": \"langchainjs\",\n                    \"versions\": [\n                        {\n                            \"version\": \"@langchain/core >= 1.0.0, < 1.1.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"@langchain/core < 0.3.80\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"langchain >= 1.0.0, < 1.2.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"langchain < 0.3.37\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6,"severity":"HIGH"}],"references":["https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6","https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62","https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8","https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68665","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68665","identifiers":["CVE-2025-68665"]},"retained":false,"historicalAffected":[]}],"coverage":[]}