Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-3248
CVE-2025-3248:
LangFlow vulnerability analysis and mitigation
Overview
CVE-2025-3248 is a critical code injection vulnerability discovered in Langflow, a popular tool used for building agentic AI workflows. The vulnerability affects versions prior to 1.3.0, specifically in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can exploit this vulnerability to execute arbitrary code on vulnerable servers (Horizon3 Research, NVD).
Technical details
The vulnerability exists in the code validation endpoint (/api/v1/validate/code) where Python's exec function is used on untrusted user input. The vulnerability can be exploited through Python decorators and default arguments in function definitions, allowing attackers to execute arbitrary code. The severity is rated as Critical with a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating the highest level of severity (Horizon3 Research).
Impact
The vulnerability allows attackers to gain full control of vulnerable servers without requiring authentication. This means an attacker can execute arbitrary code on the target system, potentially leading to complete system compromise. The impact is particularly severe as it affects a tool used in AI workflows, potentially exposing sensitive data and computational resources (Horizon3 Research).
Mitigation and workarounds
The vulnerability has been patched in Langflow version 1.3.0. Users are strongly advised to upgrade to this version immediately. For those unable to upgrade immediately, it is recommended to restrict network access to the Langflow instance (Langflow Release, Horizon3 Research).
Additional resources
Source: This report was generated using AI
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