Security Bulletin
Summary
A security vulnerability was identified in the Langchain OSS package used in our product. The issue has been resolved by removing the vulnerable package and all LangChain-related dependencies from the codebase.
Vulnerability Details
CVEID: CVE-2025-68665
DESCRIPTION: 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
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: NVD
CVSS Base score: 9.1
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Rhapsody Systems Engineering | 1.5.0-1.5.4 and 1.6.0 |
Remediation/Fixes
The Rhapsody SE team has fully remediated CVE-2025-68665 vulnerability by removing the impacted package and permanently eliminating all LangChain-related dependencies from the codebase. No residual exposure remains in supported versions.
| Product(s) | Version(s) | How to remediate? |
| IBM Rhapsody Systems Engineering | 1.5.0-1.5.4 |
The vulnerability can be remediated by upgrading to version IBM Rhapsody Systems Engineering v1.5.5
Link: https://www.ibm.com/docs/en/systems-engineering/1.5.0?topic=upgrading |
| IBM Rhapsody Systems Engineering | 1.6.0 |
The vulnerability can be remediated by upgrading to version IBM Rhapsody Systems Engineering v1.6.1
Link: https://www.ibm.com/docs/en/systems-engineering/1.6.0?topic=upgrading |
Workarounds and Mitigations
None
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References
Acknowledgement
Change History
16 Mar 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
16 March 2026
Initial Publish date:
16 March 2026
UID
ibm17266186