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CVE

CVE-2025-68664

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

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. 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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68664.json, https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8, https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6, https://github.com/langchain-ai/langchain/pull/34455, https://github.com/langchain-ai/langchain/pull/34458, 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, https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm, https://nvd.nist.gov/vuln/detail/CVE-2025-68664

Severity

9.3

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.3
EPSS Probability
0.00071%
EPSS Percentile
0.21967%
Introduced Version
4a65e827f7d7fd8139a4232f408a005f704dc71b,0
Fix Available
2e0bed6a21610618b7040cebc6b3b927e120a51a,6dc06da1bb2f3781844895c259a67e40bc598f19

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