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CVE-2026-4963— huggingface smolagents Incomplete Fix CVE-2025-9959 local_python_executor.py evaluate_with code injection

Quick assessment

Affected
huggingface smolagents
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

smolagents是Hugging Face开源的一个代理的基本库。 smolagents 1.25.0.dev0版本存在安全漏洞，该漏洞源于对文件src/smolagents/local_python_executor.py中函数的错误操作，可能导致代码注入。

CVSS 6.3 · Medium EPSS 0.73% · P53
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I. Basic Information for CVE-2026-4963

Vulnerability Information
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Vulnerability Title
huggingface smolagents Incomplete Fix CVE-2025-9959 local_python_executor.py evaluate_with code injection
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in huggingface smolagents 1.25.0.dev0. This affects the function evaluate_augassign/evaluate_call/evaluate_with of the file src/smolagents/local_python_executor.py of the component Incomplete Fix CVE-2025-9959. This manipulation causes code injection. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
smolagents 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
smolagents是Hugging Face开源的一个代理的基本库。 smolagents 1.25.0.dev0版本存在安全漏洞，该漏洞源于对文件src/smolagents/local_python_executor.py中函数的错误操作，可能导致代码注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
huggingface smolagents 1.25.0.dev0 cpe:2.3:a:huggingface:smolagents:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4963

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III. Intelligence Information for CVE-2026-4963

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Vendor Advisories for CVE-2026-4963 (4)

Proof of Concept for CVE-2026-4963 (2)

IV. Related Vulnerabilities

Same product: smolagents
Same vendor: huggingface
Same weakness: CWE-94

V. Comments for CVE-2026-4963

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