RCE in Huggingface Smolagents
CVE-2026-4963
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-2025-995…
EPSS: 0.000 (6.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Huggingface Smolagents — versions 1.25.0, 1.25.0.dev0
Weakness classification (CWE)
References
- VDB-353840 | huggingface smolagents Incomplete Fix CVE-2025-9959 local_python_executor.py evaluate_with code injection (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-353840 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #777623 | HuggingFace smolagents 1.25.0.dev0 CWE-693 (Exploit, Third Party Advisory, VDB Entry, third-party-advisory)
- Submit #777643 | HuggingFace smolagents 1.25.0.dev0 CWE-693 (Duplicate) (Exploit, Third Party Advisory, VDB Entry, third-party-advisory)
- Submit #777644 | HuggingFace smolagents 1.25.0.dev0 CWE-693 (Duplicate) (Exploit, Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (related, Exploit, Third Party Advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-4963?
- CVE-2026-4963 is a medium-severity vulnerability in Huggingface Smolagents, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-27.
- How severe is CVE-2026-4963?
- Medium severity. CVSS v3 base score is 6.3 out of 10.