CVE-2026-3357
Received Received - Intake
Deserialization Vulnerability in IBM Langflow Enables Code Execution

Publication date: 2026-04-08

Last updated on: 2026-04-14

Assigner: IBM Corporation

Description
IBM Langflow Desktop 1.6.0 through 1.8.2 Langflow could allow an authenticated user to execute arbitrary code on the system, caused by an insecure default setting which permits the deserialization of untrusted data in the FAISS component.
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Meta Information
Published
2026-04-08
Last Modified
2026-04-14
Generated
2026-06-16
AI Q&A
2026-04-08
EPSS Evaluated
2026-06-14
NVD
CVE-2026-3357
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
langflow langflow From 1.6.0 (inc) to 1.8.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Impact Analysis

This vulnerability can have severe impacts because it allows an authenticated attacker to execute arbitrary code on the affected system.

Since the attacker gains the backend service's privileges, they could potentially take full control of the system, leading to unauthorized access, data theft, data corruption, or disruption of services.

The CVSS score indicates high impact on confidentiality, integrity, and availability, meaning sensitive data could be exposed or altered, and system operations could be interrupted.

Detection Guidance

There are no specific detection commands or network/system detection methods provided for this vulnerability.

Mitigation Strategies

IBM recommends remediating this vulnerability by upgrading IBM Langflow Desktop to version 1.8.3 or later.

No workarounds or mitigations are available other than upgrading.

Compliance Impact

The vulnerability allows an authenticated attacker to execute arbitrary code on the system, leading to a high impact on confidentiality, integrity, and availability of data.

Such a compromise could potentially lead to unauthorized access or manipulation of sensitive data, which may affect compliance with standards and regulations like GDPR and HIPAA that require protection of personal and health information.

However, the provided information does not explicitly state the direct impact on compliance with these standards.

Executive Summary

The CVE-2026-3357 vulnerability affects IBM Langflow Desktop versions 1.6.0 through 1.8.2, specifically in the FAISS Vector Store component used for retrieval-augmented generation workflows.

The issue is caused by an insecure default setting that allows unsafe deserialization of untrusted Python Pickle data. This means that an authenticated attacker can upload a maliciously crafted Pickle file and configure the component to load it.

Exploiting this vulnerability enables the attacker to execute arbitrary code on the system with the backend service's privileges, effectively allowing remote code execution.

This vulnerability is classified under CWE-502 (Deserialization of Untrusted Data) and has a high severity score (CVSS v3.1 base score of 8.8).

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