Vulnerability Details 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. 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 22.0%
CVSS Severity
CVSS v3 Score 9.3
Products affected by CVE-2025-68664
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cpe:2.3:a:langchain:langchain_core:0.0.1
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cpe:2.3:a:langchain:langchain_core:0.0.10
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cpe:2.3:a:langchain:langchain_core:0.0.11
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cpe:2.3:a:langchain:langchain_core:0.0.12
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cpe:2.3:a:langchain:langchain_core:0.0.13
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cpe:2.3:a:langchain:langchain_core:0.0.15
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cpe:2.3:a:langchain:langchain_core:0.0.2
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cpe:2.3:a:langchain:langchain_core:0.0.3
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cpe:2.3:a:langchain:langchain_core:0.0.33
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cpe:2.3:a:langchain:langchain_core:0.0.4
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cpe:2.3:a:langchain:langchain_core:0.0.42
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cpe:2.3:a:langchain:langchain_core:0.0.47
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cpe:2.3:a:langchain:langchain_core:0.0.5
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cpe:2.3:a:langchain:langchain_core:0.0.6
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cpe:2.3:a:langchain:langchain_core:0.0.7
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cpe:2.3:a:langchain:langchain_core:0.0.8
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cpe:2.3:a:langchain:langchain_core:0.0.9
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cpe:2.3:a:langchain:langchain_core:0.1.0
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cpe:2.3:a:langchain:langchain_core:0.1.1
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cpe:2.3:a:langchain:langchain_core:0.1.10
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cpe:2.3:a:langchain:langchain_core:0.1.11
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cpe:2.3:a:langchain:langchain_core:0.1.13
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cpe:2.3:a:langchain:langchain_core:0.1.14
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cpe:2.3:a:langchain:langchain_core:0.1.16
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cpe:2.3:a:langchain:langchain_core:0.1.17
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cpe:2.3:a:langchain:langchain_core:0.1.18
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cpe:2.3:a:langchain:langchain_core:0.1.19
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cpe:2.3:a:langchain:langchain_core:0.1.2
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cpe:2.3:a:langchain:langchain_core:0.1.20
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cpe:2.3:a:langchain:langchain_core:0.1.21
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cpe:2.3:a:langchain:langchain_core:0.1.22
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cpe:2.3:a:langchain:langchain_core:0.1.23
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cpe:2.3:a:langchain:langchain_core:0.1.24
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cpe:2.3:a:langchain:langchain_core:0.1.25
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cpe:2.3:a:langchain:langchain_core:0.1.26
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cpe:2.3:a:langchain:langchain_core:0.1.27
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cpe:2.3:a:langchain:langchain_core:0.1.28
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cpe:2.3:a:langchain:langchain_core:0.1.29
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cpe:2.3:a:langchain:langchain_core:0.1.3
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cpe:2.3:a:langchain:langchain_core:0.1.30
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cpe:2.3:a:langchain:langchain_core:0.1.31
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cpe:2.3:a:langchain:langchain_core:0.1.32
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cpe:2.3:a:langchain:langchain_core:0.1.34
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cpe:2.3:a:langchain:langchain_core:0.1.35
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cpe:2.3:a:langchain:langchain_core:0.1.36
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cpe:2.3:a:langchain:langchain_core:0.1.37
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cpe:2.3:a:langchain:langchain_core:0.1.38
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cpe:2.3:a:langchain:langchain_core:0.1.39
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cpe:2.3:a:langchain:langchain_core:0.1.4
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cpe:2.3:a:langchain:langchain_core:0.1.40
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cpe:2.3:a:langchain:langchain_core:0.1.41
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cpe:2.3:a:langchain:langchain_core:0.1.43
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cpe:2.3:a:langchain:langchain_core:0.1.44
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cpe:2.3:a:langchain:langchain_core:0.1.45
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cpe:2.3:a:langchain:langchain_core:0.1.46
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cpe:2.3:a:langchain:langchain_core:0.1.48
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cpe:2.3:a:langchain:langchain_core:0.1.49
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cpe:2.3:a:langchain:langchain_core:0.1.5
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cpe:2.3:a:langchain:langchain_core:0.1.50
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cpe:2.3:a:langchain:langchain_core:0.1.51
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cpe:2.3:a:langchain:langchain_core:0.1.52
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cpe:2.3:a:langchain:langchain_core:0.1.53
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cpe:2.3:a:langchain:langchain_core:0.1.6
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cpe:2.3:a:langchain:langchain_core:0.1.7
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cpe:2.3:a:langchain:langchain_core:0.1.8
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cpe:2.3:a:langchain:langchain_core:0.1.9
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cpe:2.3:a:langchain:langchain_core:0.2.0
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cpe:2.3:a:langchain:langchain_core:0.2.1
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cpe:2.3:a:langchain:langchain_core:0.2.10
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cpe:2.3:a:langchain:langchain_core:0.2.11
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cpe:2.3:a:langchain:langchain_core:0.2.12
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cpe:2.3:a:langchain:langchain_core:0.2.13
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cpe:2.3:a:langchain:langchain_core:0.2.15
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cpe:2.3:a:langchain:langchain_core:0.2.16
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cpe:2.3:a:langchain:langchain_core:0.2.17
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cpe:2.3:a:langchain:langchain_core:0.2.18
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cpe:2.3:a:langchain:langchain_core:0.2.19
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cpe:2.3:a:langchain:langchain_core:0.2.2
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cpe:2.3:a:langchain:langchain_core:0.2.20
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cpe:2.3:a:langchain:langchain_core:0.2.21
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cpe:2.3:a:langchain:langchain_core:0.2.22
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cpe:2.3:a:langchain:langchain_core:0.2.23
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cpe:2.3:a:langchain:langchain_core:0.2.24
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cpe:2.3:a:langchain:langchain_core:0.2.25
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cpe:2.3:a:langchain:langchain_core:0.2.26
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cpe:2.3:a:langchain:langchain_core:0.2.27
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cpe:2.3:a:langchain:langchain_core:0.2.28
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cpe:2.3:a:langchain:langchain_core:0.2.29
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cpe:2.3:a:langchain:langchain_core:0.2.3
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cpe:2.3:a:langchain:langchain_core:0.2.30
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cpe:2.3:a:langchain:langchain_core:0.2.31
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cpe:2.3:a:langchain:langchain_core:0.2.32
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cpe:2.3:a:langchain:langchain_core:0.2.33
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cpe:2.3:a:langchain:langchain_core:0.2.34
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cpe:2.3:a:langchain:langchain_core:0.2.35
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cpe:2.3:a:langchain:langchain_core:0.2.36
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cpe:2.3:a:langchain:langchain_core:0.2.37
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cpe:2.3:a:langchain:langchain_core:0.2.38
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cpe:2.3:a:langchain:langchain_core:0.2.39
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cpe:2.3:a:langchain:langchain_core:0.2.4
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cpe:2.3:a:langchain:langchain_core:0.2.40
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cpe:2.3:a:langchain:langchain_core:0.2.41
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cpe:2.3:a:langchain:langchain_core:0.2.42
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cpe:2.3:a:langchain:langchain_core:0.2.43
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cpe:2.3:a:langchain:langchain_core:0.2.5
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cpe:2.3:a:langchain:langchain_core:0.2.6
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cpe:2.3:a:langchain:langchain_core:0.2.7
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cpe:2.3:a:langchain:langchain_core:0.2.8
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cpe:2.3:a:langchain:langchain_core:0.2.9
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cpe:2.3:a:langchain:langchain_core:0.3.0
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cpe:2.3:a:langchain:langchain_core:0.3.1
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cpe:2.3:a:langchain:langchain_core:0.3.10
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cpe:2.3:a:langchain:langchain_core:0.3.11
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cpe:2.3:a:langchain:langchain_core:0.3.12
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cpe:2.3:a:langchain:langchain_core:0.3.13
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cpe:2.3:a:langchain:langchain_core:0.3.14
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cpe:2.3:a:langchain:langchain_core:0.3.15
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cpe:2.3:a:langchain:langchain_core:0.3.16
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cpe:2.3:a:langchain:langchain_core:0.3.17
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cpe:2.3:a:langchain:langchain_core:0.3.18
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cpe:2.3:a:langchain:langchain_core:0.3.19
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cpe:2.3:a:langchain:langchain_core:0.3.2
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cpe:2.3:a:langchain:langchain_core:0.3.20
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cpe:2.3:a:langchain:langchain_core:0.3.21
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cpe:2.3:a:langchain:langchain_core:0.3.22
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cpe:2.3:a:langchain:langchain_core:0.3.23
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cpe:2.3:a:langchain:langchain_core:0.3.24
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cpe:2.3:a:langchain:langchain_core:0.3.25
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cpe:2.3:a:langchain:langchain_core:0.3.26
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cpe:2.3:a:langchain:langchain_core:0.3.27
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cpe:2.3:a:langchain:langchain_core:0.3.28
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cpe:2.3:a:langchain:langchain_core:0.3.29
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cpe:2.3:a:langchain:langchain_core:0.3.3
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cpe:2.3:a:langchain:langchain_core:0.3.30
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cpe:2.3:a:langchain:langchain_core:0.3.31
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cpe:2.3:a:langchain:langchain_core:0.3.32
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cpe:2.3:a:langchain:langchain_core:0.3.33
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cpe:2.3:a:langchain:langchain_core:0.3.34
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cpe:2.3:a:langchain:langchain_core:0.3.35
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cpe:2.3:a:langchain:langchain_core:0.3.36
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cpe:2.3:a:langchain:langchain_core:0.3.37
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cpe:2.3:a:langchain:langchain_core:0.3.38
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cpe:2.3:a:langchain:langchain_core:0.3.39
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cpe:2.3:a:langchain:langchain_core:0.3.4
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cpe:2.3:a:langchain:langchain_core:0.3.40
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cpe:2.3:a:langchain:langchain_core:0.3.41
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cpe:2.3:a:langchain:langchain_core:0.3.42
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cpe:2.3:a:langchain:langchain_core:0.3.43
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cpe:2.3:a:langchain:langchain_core:0.3.44
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cpe:2.3:a:langchain:langchain_core:0.3.45
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cpe:2.3:a:langchain:langchain_core:0.3.46
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cpe:2.3:a:langchain:langchain_core:0.3.47
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cpe:2.3:a:langchain:langchain_core:0.3.48
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cpe:2.3:a:langchain:langchain_core:0.3.49
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cpe:2.3:a:langchain:langchain_core:0.3.5
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cpe:2.3:a:langchain:langchain_core:0.3.50
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cpe:2.3:a:langchain:langchain_core:0.3.51
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cpe:2.3:a:langchain:langchain_core:0.3.52
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cpe:2.3:a:langchain:langchain_core:0.3.53
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cpe:2.3:a:langchain:langchain_core:0.3.54
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cpe:2.3:a:langchain:langchain_core:0.3.55
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cpe:2.3:a:langchain:langchain_core:0.3.56
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cpe:2.3:a:langchain:langchain_core:0.3.57
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cpe:2.3:a:langchain:langchain_core:0.3.58
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cpe:2.3:a:langchain:langchain_core:0.3.59
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cpe:2.3:a:langchain:langchain_core:0.3.6
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cpe:2.3:a:langchain:langchain_core:0.3.60
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cpe:2.3:a:langchain:langchain_core:0.3.61
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cpe:2.3:a:langchain:langchain_core:0.3.62
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cpe:2.3:a:langchain:langchain_core:0.3.63
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cpe:2.3:a:langchain:langchain_core:0.3.64
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cpe:2.3:a:langchain:langchain_core:0.3.65
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cpe:2.3:a:langchain:langchain_core:0.3.66
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cpe:2.3:a:langchain:langchain_core:0.3.67
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cpe:2.3:a:langchain:langchain_core:0.3.68
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cpe:2.3:a:langchain:langchain_core:0.3.69
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cpe:2.3:a:langchain:langchain_core:0.3.7
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cpe:2.3:a:langchain:langchain_core:0.3.70
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cpe:2.3:a:langchain:langchain_core:0.3.71
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cpe:2.3:a:langchain:langchain_core:0.3.72
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cpe:2.3:a:langchain:langchain_core:0.3.73
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cpe:2.3:a:langchain:langchain_core:0.3.74
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cpe:2.3:a:langchain:langchain_core:0.3.75
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cpe:2.3:a:langchain:langchain_core:0.3.76
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cpe:2.3:a:langchain:langchain_core:0.3.77
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cpe:2.3:a:langchain:langchain_core:0.3.78
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cpe:2.3:a:langchain:langchain_core:0.3.79
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cpe:2.3:a:langchain:langchain_core:0.3.8
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cpe:2.3:a:langchain:langchain_core:0.3.80
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cpe:2.3:a:langchain:langchain_core:0.3.9
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cpe:2.3:a:langchain:langchain_core:1.0.0
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cpe:2.3:a:langchain:langchain_core:1.0.1
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cpe:2.3:a:langchain:langchain_core:1.0.2
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cpe:2.3:a:langchain:langchain_core:1.0.3
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cpe:2.3:a:langchain:langchain_core:1.0.4
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cpe:2.3:a:langchain:langchain_core:1.0.5
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cpe:2.3:a:langchain:langchain_core:1.0.6
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cpe:2.3:a:langchain:langchain_core:1.0.7
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cpe:2.3:a:langchain:langchain_core:1.1.0
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cpe:2.3:a:langchain:langchain_core:1.1.1
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cpe:2.3:a:langchain:langchain_core:1.1.2
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cpe:2.3:a:langchain:langchain_core:1.1.3
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cpe:2.3:a:langchain:langchain_core:1.2.0
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cpe:2.3:a:langchain:langchain_core:1.2.1
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cpe:2.3:a:langchain:langchain_core:1.2.2
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cpe:2.3:a:langchain:langchain_core:1.2.3
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cpe:2.3:a:langchain:langchain_core:1.2.4