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Vulnerability record · CVE-2026-4963 · published 27 March 2026

CVE-2026-4963: Huggingface smolagents injection vulnerability

Huggingface · Smolagents

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.

2.1 CVSS 4.0 Low EPSS 0.73% · top 47.5% CWE-74 · InjectionCWE-94 · Code injection
2.1CVSS 4.0 base score, v2 7.5
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References, 5 tagged exploit
17 Jun 2026Last modified by NVD

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: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858be ExploitThird Party Advisory
https://gist.github.com/YLChen-007/7146f45960f79bc1e2976fed526e0a9b ExploitThird Party Advisory
https://vuldb.com/?ctiid.353840 Permissions RequiredVDB Entry
https://vuldb.com/?id.353840 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.777623 ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.777643 ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.777644 ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-4963), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.