Detections
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Echo: @langchain/core, langchain: security update to 0.3.37

critical Tenable Cloud Security Plugin ID 459237

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80
 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability
 exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using
 JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in
 kwargs. 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 @langchain/core versions 0.3.80 and 1.1.8, and
 langchain versions 0.3.37 and 1.2.3 (CVE-2025-68665)

Solution

Update the langchain library and its related packages to version 0.3.37 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-68665

Plugin Details

Severity: Critical

ID: 459237

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2025-68665

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 12/23/2025

Reference Information

CVE: CVE-2025-68665