CVE-2026-40158

{"id": "CVE-2026-40158", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40158", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-10T18:31:02.529674Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "MervinPraison", "product": "PraisonAI", "versions": [{"status": "affected", "version": "< 4.5.128"}]}]}], "published": "2026-04-10T17:17:13.603", "references": [{"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-3c4r-6p77-xwr7", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-693"}]}], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI's AST-based Python sandbox can be bypassed using type.__getattribute__ trampoline, allowing arbitrary code execution when running untrusted agent code. The _execute_code_direct function in praisonaiagents/tools/python_tools.py uses AST filtering to block dangerous Python attributes like __subclasses__, __globals__, and __bases__. However, the filter only checks ast.Attribute nodes, allowing a bypass. The sandbox relies on AST-based filtering of attribute access but fails to account for dynamic attribute resolution via built-in methods such as type.getattribute, resulting in incomplete enforcement of security restrictions. The string '__subclasses__' is an ast.Constant, not an ast.Attribute, so it is never checked against the blocked list. This vulnerability is fixed in 4.5.128."}, {"lang": "es", "value": "PraisonAI es un sistema de equipos multiagente. Antes de la 4.5.128, el sandbox de Python basado en AST de PraisonAI puede ser eludido utilizando el trampoline type.__getattribute__, permitiendo la ejecuci\u00f3n de c\u00f3digo arbitrario al ejecutar c\u00f3digo de agente no confiable. La funci\u00f3n _execute_code_direct en praisonaiagents/tools/python_tools.py utiliza filtrado AST para bloquear atributos peligrosos de Python como __subclasses__, __globals__ y __bases__. Sin embargo, el filtro solo verifica nodos ast.Attribute, permitiendo una elusi\u00f3n. El sandbox se basa en el filtrado basado en AST del acceso a atributos, pero no tiene en cuenta la resoluci\u00f3n din\u00e1mica de atributos a trav\u00e9s de m\u00e9todos incorporados como type.getattribute, lo que resulta en una aplicaci\u00f3n incompleta de las restricciones de seguridad. La cadena \u2019__subclasses__\u2019 es un ast.Constant, no un ast.Attribute, por lo que nunca se verifica contra la lista bloqueada. Esta vulnerabilidad est\u00e1 corregida en la 4.5.128."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56CDE5F5-B03C-4C3A-9A92-F61C9DFDA9B1", "versionEndExcluding": "4.5.128"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}