CVE-2026-4963CRITICAL 10.0EPSS p42.9%

CVE-2026-4963CVE-2026-4963

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.

Scoring

CVSS 3.110.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.57% probability of exploitation · percentile 42.9% · 2026-06-19T12:03:05Z
Published2026-03-27
Last modified2026-04-30

Underlying weaknesses· 2

CWE-74CWE-94

References

  1. https://gist.github.com/YLChen-007/35b7d46e892266a0ed6dbe57802858be
  2. https://gist.github.com/YLChen-007/7146f45960f79bc1e2976fed526e0a9b
  3. https://vuldb.com/?ctiid.353840
  4. https://vuldb.com/?id.353840
  5. https://vuldb.com/?submit.777623
  6. https://vuldb.com/?submit.777643
  7. https://vuldb.com/?submit.777644

2

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')cwe-740%live
WeaknessImproper Control of Generation of Code ('Code Injection')cwe-940%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.