What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-27 · updated 2026-10-26
• Weakness: CWE-74

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.

Affected products

• huggingface smolagents: 1.25.0-dev0

References

• https://gist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858be
• https://gist.github.com/YLChen-007/7146f45960f79bc1e2976fed526e0a9b
• https://vuldb.com/?ctiid.353840
• https://vuldb.com/?id.353840
• https://vuldb.com/?submit.777623
• https://vuldb.com/?submit.777643
• https://vuldb.com/?submit.777644

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