PraisonAI has Improper Control of Generation of Code (‘Code Injection’) and Protection Mechanism Failure in praisonai_CVE-2026-40158

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-10T16:49:24.753Z",
    "modified": "2026-04-10T18:31:12.440Z",
    "type": "cve",
    "title": "PraisonAI has Improper Control of Generation of Code ('Code Injection') and Protection Mechanism Failure in praisonai",
    "source": "GitHub_M",
    "references": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-3c4r-6p77-xwr7",
    "id": "CVE-2026-40158",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94",
        "CWE-693"
    ],
    "cvelist": null,
    "sourceData": "MervinPraison PraisonAI < 4.5.128",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "PraisonAI",
    "version": "< 4.5.128",
    "vendor": "MervinPraison",
    "ai_description": "AST-based Python sandbox bypass via type.__getattribute__ trampoline, allowing arbitrary code execution",
    "ai_severity": "High",
    "ai_vendor": "MervinPraison",
    "ai_product": "PraisonAI",
    "ai_version": "< 4.5.128",
    "ai_score": 8.6
}