Is CVE-2026-44843 actively exploited?

No active exploitation of CVE-2026-44843 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44843 be exploited remotely?

Yes. CVE-2026-44843 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44843?

CVE-2026-44843 has a CVSS score of 8.2 (HIGH).

HOME VULNERABILITIESCVE-2026-44843

HIGH

CVE-2026-44843

CWE-502Published: May 26, 2026· Updated: May 29, 2026

8.2

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-44843 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.2.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.