Critical severity · published Mar 27, 2026
CVE-2026-4963
huggingface smolagents Incomplete Fix CVE-2025-9959 local_python_executor.py evaluate_with code injection
10.0
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SM
smolagents · huggingface
1.25.0.dev0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4963
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4963
Exploit
https://gist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858be
Exploit
https://gist.github.com/YLChen-007/7146f45960f79bc1e2976fed526e0a9b
Permissions Required
https://vuldb.com/?ctiid.353840
Third Party Advisory
https://vuldb.com/?id.353840
Exploit
https://vuldb.com/?submit.777623
Exploit
https://vuldb.com/?submit.777643
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