{"id":"CVE-2025-9959","title":"Incomplete validation of dunder attributes allows an attacker to escape from the Local Python execution environment sandbox, enforced by smolagents","summary":"Incomplete validation of dunder attributes allows an attacker to escape from the Local Python execution environment sandbox, enforced by smolagents. The attack requires a Prompt Injection in order to trick the agent to create malicious c…","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","cwe":["CWE-94"],"published":"2025-09-03","updated":"2026-09-26","sourceUpdated":"2026-09-26T00:10:00.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-9959","references":[{"url":"https://github.com/huggingface/smolagents/pull/1551","label":"reefs@jfrog.com"},{"url":"https://research.jfrog.com/vulnerabilities/smolagents-local-python-sandbox-escape-jfsa-2025-001434277/","label":"reefs@jfrog.com"}],"tags":["nvd"],"epss":0.00312,"epssPercentile":0.21454,"ingestedAt":"2026-09-26T00:22:39.908Z","slug":"CVE-2025-9959","body":"## Overview\n\nIncomplete validation of dunder attributes allows an attacker to escape from the Local Python execution environment sandbox, enforced by smolagents. The attack requires a Prompt Injection in order to trick the agent to create malicious code.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}