PT-2025-35805 · Pypi · Smolagents

Nnfrog · Published 2025-09-03 · Updated 2026-05-24 · CVE-2025-9959

Positive Technologies (AI Summary)

CVSS v3.1

7.6

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L

Name of the Vulnerable Software and Affected Versions smolagents (affected versions not specified)

Description Incomplete validation of dunder attributes allows an attacker to escape from the Local Python execution environment sandbox enforced by the software. The attack requires a Prompt Injection to trick the agent into creating malicious code.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2025-9959

Affected Products

Smolagents

References · 7

• https://github.com/huggingface/smolagents/pull/1551 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-9959 · Security Note
• https://osv.dev/vulnerability/CVE-2025-9959 · Vendor Advisory
• https://t.me/CVEtracker/31614 · Telegram Post
• https://twitter.com/CVEnew/status/1963293582820864138 · Twitter Post
• https://twitter.com/HugoValters/status/2058540518985081089 · Twitter Post
• https://research.jfrog.com/vulnerabilities/smolagents-local-python-sandbox-escape-jfsa-2025-001434277 · Note