Heym < 0.0.21 Path Traversal File Upload via upload_file()_CVE-2026-45225

{
    "lastseen": "",
    "description": "Heym before 0.0.21 contains a path traversal vulnerability in the file upload endpoint that allows authenticated users to write attacker-controlled files to arbitrary locations by supplying a crafted filename with traversal sequences. Attackers can exploit the unvalidated filename parameter in the upload_file() handler to bypass path restrictions and write, read, or delete files outside the intended storage directory.",
    "published": "2026-05-12T21:09:28.287Z",
    "modified": "2026-05-12T21:09:28.287Z",
    "type": "cve",
    "title": "Heym < 0.0.21 Path Traversal File Upload via upload_file()",
    "source": "VulnCheck",
    "references": "https://github.com/heymrun/heym/releases/tag/v0.0.21\nhttps://github.com/heymrun/heym/pull/92\nhttps://github.com/heymrun/heym/commit/835843e6d2bf7d018cbb8e50f28f0426eaa20c84\nhttps://www.vulncheck.com/advisories/heym-path-traversal-file-upload-via-upload-file",
    "id": "CVE-2026-45225",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "heymrun heym 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.2,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/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": "heym",
    "version": "0",
    "vendor": "heymrun",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}