Detections
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Echo: langsmith: security update to 0.5.18

critical Tenable Self-Hosted Container Security Plugin ID 464372

Description

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

 - LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the
 LangSmith JavaScript/TypeScript SDK (langsmith) contains an incomplete prototype pollution fix in its
 internally vendored lodash set() utility. The baseAssignValue() function only guards against the __proto__
 key, but fails to prevent traversal via constructor.prototype. This allows an attacker who controls keys
 in data processed by the createAnonymizer() API to pollute Object.prototype, affecting all objects in the
 Node.js process. This vulnerability is fixed in 0.5.18. (CVE-2026-40190)

Solution

Update the langsmith library and its related packages to version 0.5.18 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-40190

Plugin Details

Severity: Critical

ID: 464372

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.06

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-40190

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 4/10/2026

Reference Information

CVE: CVE-2026-40190