{"id":"CVE-2025-68664","state":"PUBLISHED","title":"LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs","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.","publishedAt":"2025-12-23T22:47:44.084Z","updatedAt":"2025-12-24T14:40:58.427Z","severity":{"score":9.3,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["langchain-ai langchain"],"affected":[{"vendor":"langchain-ai","product":"langchain","versions":[{"version":">= 1.0.0, < 1.2.5","status":"affected"},{"version":"< 0.3.81","status":"affected"}]}],"references":["https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm","https://github.com/langchain-ai/langchain/pull/34455","https://github.com/langchain-ai/langchain/pull/34458","https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8","https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6","https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81","https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5"],"weaknesses":["CWE-502"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68664.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68664","state":"PUBLISHED","datePublished":"2025-12-23T22:47:44.084Z","dateUpdated":"2025-12-24T14:40:58.427Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-12-22T23:28:02.917Z"},"containers":{"cna":{"title":"LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"langchain-ai","product":"langchain","versions":[{"version":">= 1.0.0, < 1.2.5","status":"affected"},{"version":"< 0.3.81","status":"affected"}]}],"references":[{"url":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm","name":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langchain-ai/langchain/pull/34455","name":"https://github.com/langchain-ai/langchain/pull/34455","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/pull/34458","name":"https://github.com/langchain-ai/langchain/pull/34458","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8","name":"https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6","name":"https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81","name":"https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81","tags":["x_refsource_MISC"]},{"url":"https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5","name":"https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","lang":"en","description":"CWE-502: Deserialization of Untrusted Data","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-23T22:47:44.084Z"},"source":{"advisory":"GHSA-c67j-w6g6-q2cm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-24T14:40:55.506059Z","id":"CVE-2025-68664","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-24T14:40:58.427Z"}}]}}}