Detections
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Echo: langchain-core: security update to 0.3.81

high Tenable Cloud Security Plugin ID 455528

Description

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

 - 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. (CVE-2025-68664)

Solution

Update the langchain-core library and its related packages to version 0.3.81 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-68664

Plugin Details

Severity: High

ID: 455528

Version: Revision 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Medium

Score: 6.2

Percentile: 96.59

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-68664

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/1/2026

Vulnerability Publication Date: 12/23/2025

Reference Information

CVE: CVE-2025-68664