CVE-2025-68664
Last modified
CVE-2025-68664 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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. EPSS estimates a 13.83% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Langchain | Langchain Core | < 0.3.81 |
| Langchain | Langchain Core | >= 1.0.0, < 1.2.5 |
References
- https://github.com/langchain-ai/langchain/pull/34455Issue Tracking, Patch
- https://github.com/langchain-ai/langchain/pull/34458Issue Tracking, Patch
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cmExploit, Vendor Advisory
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cmExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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