CVE-2026-4963: medium-severity vulnerability in huggingface smolagents
huggingface smolagents Incomplete Fix CVE-2025-9959 local_python_executor.py evaluate_with code injection
Published · Updated
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33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.3epss 0.6%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
huggingface · smolagentspublic PoCs found — 1
cve_referencegist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858beunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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