CVE-2026-4963

Name: CVE-2026-4963
Creator: NVD / NIST
Published: 2026-03-27T17:16:31.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2026-4963 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. 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. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS 4.0

2.1/10

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:X/V:X/RE:X/U:X

EPSS Probability

0.57%

43.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Huggingface	Smolagents	1.25.0	Dev0

References

https://gist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858beExploit, Third Party Advisory
https://gist.github.com/YLChen-007/7146f45960f79bc1e2976fed526e0a9bExploit, Third Party Advisory
https://vuldb.com/?ctiid.353840Permissions Required, VDB Entry
https://vuldb.com/?id.353840Third Party Advisory, VDB Entry
https://vuldb.com/?submit.777623Exploit, Third Party Advisory, VDB Entry
https://vuldb.com/?submit.777643Exploit, Third Party Advisory, VDB Entry
https://vuldb.com/?submit.777644Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Mar 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4963?

How severe is CVE-2026-4963?

CVE-2026-4963 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4963?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST