Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input_CVE-2026-6409

{
    "lastseen": "",
    "description": "A Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input. Maliciously structured messages\u2014specifically those containing negative\u00a0varints or deep recursion\u2014can be used to crash the application, impacting service availability.",
    "published": "2026-04-16T14:30:51.568Z",
    "modified": "2026-04-16T14:30:51.568Z",
    "type": "cve",
    "title": "Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input",
    "source": "Google",
    "references": "https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-p2gh-cfq4-4wjc",
    "id": "CVE-2026-6409",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20"
    ],
    "cvelist": null,
    "sourceData": "Protocol Buffers Protobuf-php (Pecl) 0\nProtocol Buffers Protobuf-php (Pecl) 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Protobuf-php (Pecl)",
    "version": "0",
    "vendor": "Protocol Buffers",
    "ai_description": "",
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    "ai_score": 0
}