smolagents has Sandbox Escape Vulnerability in the local_python_executor.py Module

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.9 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L

EPSS

• CVE-2025-5120: 31.24% estimated exploitation activity in the next 30 days; percentile 98.28 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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 localpythonexecutor.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.

Published by the source

27 Jul 2025, 09:30 UTC

Last modified by the source

29 Jun 2026, 12:26 UTC

Source last checked

26 Oct 2026, 13:32 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6v92-r5mx-h5fx

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-6v92-r5mx-h5fx

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# Patch Next advisory brief: CVE-2025-5120

Advisory: smolagents has Sandbox Escape Vulnerability in the local_python_executor.py Module
IDs: CVE-2025-5120, GHSA-6v92-r5mx-h5fx
Record: https://patchnext.com/advisories/cve-2025-5120 (revision 2, source checked 26 Oct 2026, 13:32 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: smolagents 1.17.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI smolagents: affected < 1.17.0; fixed in 1.17.0

## Suggested inspection (read-only)
- `python -m pip show smolagents`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on smolagents.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-6v92-r5mx-h5fx (OSV record GHSA-6v92-r5mx-h5fx lists affected ranges: PyPI smolagents >=0 <1.17.0 (fixed))
- Verified: https://github.com/advisories/GHSA-6v92-r5mx-h5fx (GitHub-reviewed advisory GHSA-6v92-r5mx-h5fx lists affected ranges: PyPI smolagents >=0 <1.17.0)

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