Creolabs Gravity < 0.9.6 Heap Buffer Overflow via gravity_vm_exec_CVE-2026-40504

{
    "lastseen": "",
    "description": "Creolabs Gravity before 0.9.6 contains a heap buffer overflow vulnerability in the gravity_vm_exec function that allows attackers to write out-of-bounds memory by crafting scripts with many string literals at global scope. Attackers can exploit insufficient bounds checking in gravity_fiber_reassign() to corrupt heap metadata and achieve arbitrary code execution in applications that evaluate untrusted scripts.",
    "published": "2026-04-16T01:10:27.364Z",
    "modified": "2026-04-16T01:10:27.364Z",
    "type": "cve",
    "title": "Creolabs Gravity < 0.9.6 Heap Buffer Overflow via gravity_vm_exec",
    "source": "VulnCheck",
    "references": "https://github.com/marcobambini/gravity/releases/tag/0.9.6\nhttps://github.com/marcobambini/gravity/issues/437\nhttps://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38a4adca1\nhttps://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-gravity-vm-exec",
    "id": "CVE-2026-40504",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "marcobambini gravity 0\nmarcobambini gravity 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "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",
        "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": "gravity",
    "version": "0",
    "vendor": "marcobambini",
    "ai_description": "Heap buffer overflow in gravity_vm_exec function allows arbitrary code execution",
    "ai_severity": "Critical",
    "ai_vendor": "Creolabs",
    "ai_product": "Gravity",
    "ai_version": "< 0.9.6",
    "ai_score": 9.3
}