CVE-2025-68664 LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

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...

CVE-2025-68664 LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

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...

CVE-2025-68664

CVE-2025-68664 (LangGrinch) is a serialization-injection vulnerability in the LangChain Core Python package. Affected versions prior to 0.3.81 and 1.2.5 fail to escape dictionaries containing the internal lc marker during dumps/dumpd, causing user-controlled data to be treated as legitimate LangC...

CVE-2025-68664

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...

langchain-timbr (>=2.1.0, <=3.3.0), otat (>=0.1.0, <=0.1.3) +5 more potentially affected by CVE-2025-14929 via transformers (4.57.0)

transformers PYPI version 4.57.0 is affected by a known vulnerability. The following packages have a transitive dependency on transformers and may be impacted: - langchain-timbr =2.1.0, =0.1.0, =1.0.1, =0.5.3rc2, =1.1.4, =0.0.1, =0.1.3 - vllm-kunlun 0.11.1 Source cves: CVE-2025-14929 Source...

@aafe/ai-test (>=0.0.1, <=0.0.2), @acabai/android (>=1.0.0, <=2.0.6) +861 more potentially affected by CVE-2025-68665 via @langchain/core (>=0.0.0, <=0.3.79)

@langchain/core NPM version =0.0.0, =0.0.1, =1.0.0, =1.0.0, =1.0.0, =1.0.0, =0.0.1, =1.0.5, =0.1.0, =0.1.2, =0.0.1, =1.2.27, =0.1.7, =3.0.0-beta.65.0, =8.0.0, =11.0.0 and more Source cves: CVE-2025-68665 Source advisory: OSV:GHSA-R399-636X-V7F6...

10minions-engine (>=0.0.1, <=0.0.4), @0xd541ecb3/byte-babe (>=1.0.0, <=1.2.1) +821 more potentially affected by CVE-2025-68665 via langchain (>=0.0.11, <=0.3.35)

langchain NPM version =0.0.11, =0.0.1, =1.0.0, =0.0.1, =0.1.4, =3.0.0-beta.65.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.2, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.6 and more Source cves: CVE-2025-68665 Source advisory:...

@aafe/ai-test (>=0.0.1, <=0.0.2), @acabai/android (>=1.0.0, <=2.0.6) +861 more potentially affected by CVE-2025-68665 via @langchain/core (>=0.0.0, <=0.3.79)

@langchain/core NPM version =0.0.0, =0.0.1, =1.0.0, =1.0.0, =1.0.0, =1.0.0, =0.0.1, =1.0.5, =0.1.0, =0.1.2, =0.0.1, =1.2.27, =0.1.7, =3.0.0-beta.65.0, =8.0.0, =11.0.0 and more Source cves: CVE-2025-68665 Source advisory: GHSA-R399-636X-V7F6...

@axiom-lattice/agent-eval (>=2.1.9, <=2.1.100), @axiom-lattice/core (>=2.1.0, <=8.0.2) +15 more potentially affected by CVE-2025-68665 via langchain (>=1.0.2, <=1.2.0)

langchain NPM version =1.0.2, =2.1.9, =2.1.0, =1.0.11, =2.1.0, =0.1.1, =1.0.1, =1.0.1, =1.0.0, =0.1.3, =3.66.0, =3.66.0, =5.7.2, =0.0.1, =0.3.0, =0.3.1 - hedera-agent-kit 3.5.2 and more Source cves: CVE-2025-68665 Source advisory: OSV:GHSA-R399-636X-V7F6...

EUVD-2025-204846

LangChain serialization injection vulnerability enables secret extraction...

10minions-engine (>=0.0.1, <=0.0.4), @0xd541ecb3/byte-babe (>=1.0.0, <=1.2.1) +821 more potentially affected by CVE-2025-68665 via langchain (>=0.0.11, <=0.3.35)

langchain NPM version =0.0.11, =0.0.1, =1.0.0, =0.0.1, =0.1.4, =3.0.0-beta.65.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.2, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.5-alpha.0, =0.1.6 and more Source cves: CVE-2025-68665 Source advisory:...

@atom8n/ai-workflow-builder (>=1.2.1, <=1.5.8), @atom8n/backend-test-utils (>=1.2.2, <=1.5.8) +39 more potentially affected by CVE-2025-68665 via @langchain/core (>=1.0.1, <=1.1.8-dev-1766775128110)

@langchain/core NPM version =1.0.1, =1.2.1, =1.2.2, =1.2.2, =2.2.2, =2.2.2, =2.2.2, =2.1.9, =2.1.0, =2.1.0, =1.0.11, =2.1.0, =1.0.1, =2.1.0, =1.0.1, =2.1.0, =2.1.36 and more Source cves: CVE-2025-68665 Source advisory: OSV:GHSA-R399-636X-V7F6...

@axiom-lattice/agent-eval (>=2.1.9, <=2.1.100), @axiom-lattice/core (>=2.1.0, <=8.0.2) +15 more potentially affected by CVE-2025-68665 via langchain (>=1.0.2, <=1.2.0)

langchain NPM version =1.0.2, =2.1.9, =2.1.0, =1.0.11, =2.1.0, =0.1.1, =1.0.1, =1.0.1, =1.0.0, =0.1.3, =3.66.0, =3.66.0, =5.7.2, =0.0.1, =0.3.0, =0.3.1 - hedera-agent-kit 3.5.2 and more Source cves: CVE-2025-68665 Source advisory: GHSA-R399-636X-V7F6...

GHSA-R399-636X-V7F6 LangChain serialization injection vulnerability enables secret extraction

Context 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...

LangChain serialization injection vulnerability enables secret extraction

Context 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...

@atom8n/ai-workflow-builder (>=1.2.1, <=1.5.8), @atom8n/backend-test-utils (>=1.2.2, <=1.5.8) +39 more potentially affected by CVE-2025-68665 via @langchain/core (>=1.0.1, <=1.1.8-dev-1766775128110)

@langchain/core NPM version =1.0.1, =1.2.1, =1.2.2, =1.2.2, =2.2.2, =2.2.2, =2.2.2, =2.1.9, =2.1.0, =2.1.0, =1.0.11, =2.1.0, =1.0.1, =2.1.0, =1.0.1, =2.1.0, =2.1.36 and more Source cves: CVE-2025-68665 Source advisory: GHSA-R399-636X-V7F6...

a-data-processing (0.0.1), a2a-client-handler (0.1.0) +1121 more potentially affected by CVE-2025-68664 via langchain-core (>=0.0.1, <=0.3.80)

langchain-core PYPI version =0.0.1, =0.1.0, =0.1.3, =0.1.0b0, =4.8.2, =0.1.3, =0.1.0, =3.2.0, =2.1.7, =0.0.2, =0.0.5 - agentc-langchain 1.0.0 and more Source cves: CVE-2025-68664 Source advisory: GHSA-C67J-W6G6-Q2CM...

a-data-processing (0.0.1), a2a-client-handler (0.1.0) +1121 more potentially affected by CVE-2025-68664 via langchain-core (>=0.0.1, <=0.3.80)

langchain-core PYPI version =0.0.1, =0.1.0, =0.1.3, =0.1.0b0, =4.8.2, =0.1.3, =0.1.0, =3.2.0, =2.1.7, =0.0.2, =0.0.5 - agentc-langchain 1.0.0 and more Source cves: CVE-2025-68664 Source advisory: OSV:GHSA-C67J-W6G6-Q2CM...

LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

Summary 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...

accessiqlue (2025.12.21154255), agentmanager (>=0.1.0, <=0.1.1) +310 more potentially affected by CVE-2025-68664 via langchain-core (>=1.0.0, <=1.2.4)

langchain-core PYPI version =1.0.0, =0.1.0, =3.0.3, =4.0.6 and more Source cves: CVE-2025-68664 Source advisory: GHSA-C67J-W6G6-Q2CM...