CVE-2025-33253: Remote Code Execution Vulnerability in nemo-toolkit
Summary
CVE-2025-33253: NVIDIA NeMo Framework Deserializes Untrusted Data. Affects nemo-toolkit versions < 2.6.1. Fixed in 2.6.1. How to fix ↓
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Background
The NVIDIA NeMo Framework, specifically the nemo-toolkit package, is a powerful tool designed for building and training state-of-the-art conversational AI models. It provides a flexible and extensible architecture that allows developers to easily create and customize their AI applications. However, it is susceptible to a critical vulnerability that arises from the deserialization of untrusted data, which can be exploited by attackers.
Vulnerability Detail
NVIDIA NeMo Framework contains a vulnerability where an attacker could cause remote code execution by convincing a user to load a maliciously crafted file. This vulnerability originates from improper handling of data during the deserialization process, allowing an attacker to execute arbitrary code on the victim's machine. The consequences of a successful exploit may include code execution, denial of service, information disclosure, and data tampering, making it a significant security risk.
How To Fix
Minimum fixed version
2.6.1
This is the first release that contains the fix.
pip install --upgrade "nemo-toolkit==2.6.1"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users should avoid loading untrusted files into the NeMo Framework until the package is updated. Additionally, implementing strict validation of input data can help reduce the risk of exploitation.
Conclusion
The vulnerability identified as CVE-2025-33253 in the NVIDIA NeMo Framework's nemo-toolkit package poses a significant risk due to its potential for remote code execution. Users are strongly advised to update to the patched version to mitigate this risk and ensure the security of their applications.
See every vulnerability recorded for nemo-toolkit →
FAQ
CVE-2025-33253 is a vulnerability in the NVIDIA NeMo Framework's nemo-toolkit package that allows for remote code execution through the deserialization of untrusted data.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities without requiring any signup.
The potential impacts include remote code execution, denial of service, information disclosure, and data tampering, which can severely compromise the security of affected systems.
You can update the nemo-toolkit package by running the command 'pip install --upgrade nemo-toolkit' in your terminal.
The CVSS score of this vulnerability is 7.8, indicating a high severity level.
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