Sunshine: Authentication bypass via improper client certificate validation_CVE-2026-32253

{
    "lastseen": "",
    "description": "Sunshine is a self-hosted game stream host for Moonlight. In versions prior to 2026.516.143833, the client-certificate authentication can be bypassed because of how OpenSSL verification results are handled. In src/crypto.cpp, the custom verify callback treats X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY, X509_V_ERR_CERT_NOT_YET_VALID, and X509_V_ERR_CERT_HAS_EXPIRED as success. This can allow an untrusted certificate to pass authentication and access protected HTTPS endpoints. This issue has been fixed in version 2026.516.143833.",
    "published": "2026-05-22T17:07:04.619Z",
    "modified": "2026-05-22T17:07:04.619Z",
    "type": "cve",
    "title": "Sunshine: Authentication bypass via improper client certificate validation",
    "source": "GitHub_M",
    "references": "https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57\nhttps://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833",
    "id": "CVE-2026-32253",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287",
        "CWE-295"
    ],
    "cvelist": null,
    "sourceData": "LizardByte Sunshine < 2026.516.143833",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "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": "Sunshine",
    "version": "< 2026.516.143833",
    "vendor": "LizardByte",
    "ai_description": "Authentication bypass via improper client certificate validation in Sunshine game stream host",
    "ai_severity": "Critical",
    "ai_vendor": "LizardByte",
    "ai_product": "Sunshine",
    "ai_version": "< 2026.516.143833",
    "ai_score": 9.8
}