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CVE-2025-5120: Sandbox Escape Vulnerability in huggingface/smolagents

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-27 · updated 2026-06-17
• Weakness: CWE-94

Description

A sandbox escape vulnerability was identified in huggingface/smolagents version 1.14.0, allowing attackers to bypass the restricted execution environment and achieve remote code execution (RCE). The vulnerability stems from the local_python_executor.py module, which inadequately restricts Python code execution despite employing static and dynamic checks. Attackers can exploit whitelisted modules and functions to execute arbitrary code, compromising the host system. This flaw undermines the core security boundary intended to isolate untrusted code, posing risks such as unauthorized code execution, data leakage, and potential integration-level compromise. The issue is resolved in version 1.17.0.

Affected products

• huggingface smolagents: 1.14.0

References

• https://github.com/huggingface/smolagents/commit/33a942e62b6fbf6a35d41f1c735bda2d64c163d0
• https://huntr.com/bounties/63ab1cfe-b573-4cf5-a7d3-fb6c957e34b0

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