Tautulli: RCE via eval() sandbox bypass using lambda nested scope to escape co_names whitelist check_CVE-2026-28505

{
    "lastseen": "",
    "description": "Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the str_eval() function in notification_handler.py implements a sandboxed eval() for notification text templates. The sandbox attempts to restrict callable names by inspecting code.co_names of the compiled code object. However, co_names only contains names from the outer code object. When a lambda expression is used, it creates a nested code object whose attribute accesses are stored in code.co_consts, NOT in code.co_names. The sandbox never inspects nested code objects. This issue has been patched in version 2.17.0.",
    "published": "2026-03-30T19:41:54.644Z",
    "modified": "2026-03-30T20:13:28.905Z",
    "type": "cve",
    "title": "Tautulli: RCE via eval() sandbox bypass using lambda nested scope to escape co_names whitelist check",
    "source": "GitHub_M",
    "references": "https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m62j-gwm9-7p8m\nhttps://github.com/Tautulli/Tautulli/releases/tag/v2.17.0",
    "id": "CVE-2026-28505",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94",
        "CWE-95"
    ],
    "cvelist": null,
    "sourceData": "Tautulli Tautulli < 2.17.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Tautulli",
    "version": "< 2.17.0",
    "vendor": "Tautulli",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}