Invoking “go bug” follows symlinks in predictable temporary filenames in cmd/go_CVE-2026-39819

{
    "lastseen": "",
    "description": "The \"go bug\" command writes to two files with predictable names in the system temporary directory (for example, \"/tmp\"). An attacker with access to the temporary directory can create a symlink in one of these names, causing \"go bug\" to overwrite the target of the symlink.",
    "published": "2026-05-07T19:41:18.849Z",
    "modified": "2026-05-08T21:29:53.674Z",
    "type": "cve",
    "title": "Invoking \"go bug\" follows symlinks in predictable temporary filenames in cmd/go",
    "source": "Go",
    "references": "https://go.dev/issue/78584\nhttps://go.dev/cl/763882\nhttps://groups.google.com/g/golang-announce/c/qcCIEXso47M\nhttps://pkg.go.dev/vuln/GO-2026-4978",
    "id": "CVE-2026-39819",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Go toolchain cmd/go 0\nGo toolchain cmd/go 1.26.0-0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/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
}