{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81096", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-26T16:00:32.344Z", "datePublished": "2026-08-27T14:50:36.897Z", "dateUpdated": "2026-08-27T14:50:36.897Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-27T14:50:36.897Z"}, "datePublic": "2026-08-26T00:00:00.000Z", "title": "ToolUniverse through 1.2.6 Unauthenticated Remote Code Execution via python_code_executor Sandbox Escape", "descriptions": [{"lang": "en", "value": "ToolUniverse ran caller-supplied Python inside a sandbox that could be escaped, on a server that required no authentication. The executor behind the python_code_executor tool, in python_executor_tool.py, inspected the submitted source for a denied list of attribute names and calls but left the attribute-lookup builtins available and did not stop a dunder attribute reached through a string lookup or through a module already permitted, so a caller could walk from a literal's class to its base and enumerate subclasses to obtain a reference to the process and subprocess modules. A per-call argument also let the caller widen the import allow-list before the inspection ran. The HTTP and MCP servers in http_api_server.py and smcp_server.py bound to every interface with debugging enabled and no authentication, so any caller able to reach the port executed code as the server process. Version 1.3.0 adds bearer-token authentication, defaults the bind address to loopback, and hardens the attribute checks."}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-94", "description": "Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "affected": [{"vendor": "mims-harvard", "product": "ToolUniverse", "collectionURL": "https://github.com/mims-harvard/ToolUniverse", "repo": "https://github.com/mims-harvard/ToolUniverse", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "1.2.6", "status": "affected", "versionType": "semver"}], "packageURL": "pkg:pypi/tooluniverse"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "CRITICAL", "baseScore": 10, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}}], "references": [{"url": "https://github.com/mims-harvard/ToolUniverse", "tags": ["product"]}, {"url": "https://github.com/mims-harvard/ToolUniverse/pull/251", "tags": ["issue-tracking"]}, {"url": "https://github.com/mims-harvard/ToolUniverse/security/advisories/GHSA-pxwq-22vf-87fm", "tags": ["vendor-advisory"], "name": "Vendor Advisory"}, {"name": "VulnCheck Advisory: ToolUniverse through 1.2.6 Unauthenticated Remote Code Execution via python_code_executor Sandbox Escape", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/tooluniverse-through-1.2.6-unauthenticated-remote-code-execution-via-python-code-executor-sandbox-escape"}], "credits": [{"lang": "en", "value": "Avishai Gonen (Pluto Security)", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}, "source": {"discovery": "UNKNOWN"}}}}

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