CVE-2026-44843
8.2 HIGHLangChain is a framework for building agents and LLM-powered applications
Published: 2026-05-26 · Last updated: 2026-05-29
Severity and scoring
- CVSS
- 8.2 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- CWE
- CWE-502
Affected products
| Vendor | Product |
|---|---|
| langchain | langchain |
Description
LangChain is a framework for building agents and LLM-powered applications. Prior to 0.3.85 and 1.3.3, LangChain contains older runtime code paths that deserialize run inputs, run outputs, or other application-controlled payloads using overly broad object allowlists. These paths may call load() with allowed_objects="all". This does not enable arbitrary Python object deserialization, but it does allow any trusted LangChain-serializable object to be revived, which is broader than these runtime paths require. As a result, attacker-supplied LangChain serialized constructor dictionaries may cause trusted runtime paths to instantiate classes with untrusted constructor arguments. This vulnerability is fixed in 0.3.85 and 1.3.3.
Source: NVD
References
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- CVE-2026-34070 — LangChain is a framework for building agents and LLM-powered applications (7.5 HIGH)
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