Invoking “go tool pack” does not sanitize output paths in cmd/go_CVE-2026-39817

{
    "lastseen": "",
    "description": "The \"go tool pack\" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the \"pack\" subcommand can write files to arbitrary locations on the filesystem.",
    "published": "2026-05-07T19:41:18.993Z",
    "modified": "2026-05-08T21:29:47.246Z",
    "type": "cve",
    "title": "Invoking \"go tool pack\" does not sanitize output paths in cmd/go",
    "source": "Go",
    "references": "https://go.dev/issue/78778\nhttps://go.dev/cl/767520\nhttps://groups.google.com/g/golang-announce/c/qcCIEXso47M\nhttps://pkg.go.dev/vuln/GO-2026-4979",
    "id": "CVE-2026-39817",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Go toolchain cmd/go 0\nGo toolchain cmd/go 1.26.0-0",
    "sourceHref": "",
    "cvss": {
        "score": 5.9,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N",
        "version": "3.1"
    },
    "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": "cmd/go",
    "version": "0",
    "vendor": "Go toolchain",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}