CVE-2026-45388_CVE-2026-45388

{
    "lastseen": "",
    "description": "In OCaml-TLS before 2.1.0, the client implementation does insufficient checks of the certificate provided by the server, which allows impersonation with certificates that are not meant for server authentication (because of KeyUsage and ExtendedKeyUsage).",
    "published": "2026-06-15T00:00:00.000Z",
    "modified": "2026-06-16T13:57:42.571Z",
    "type": "cve",
    "title": "CVE-2026-45388",
    "source": "mitre",
    "references": "https://osv.dev/vulnerability/OSEC-2026-06",
    "id": "CVE-2026-45388",
    "bulletinFamily": "",
    "cwe": [
        "CWE-295"
    ],
    "cvelist": null,
    "sourceData": "n/a n/a n/a",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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": "OCaml-TLS",
    "version": "< 2.1.0",
    "vendor": "OCaml-TLS Project",
    "ai_description": "Insufficient certificate checks allow server impersonation",
    "ai_severity": "Critical",
    "ai_vendor": "OCaml-TLS Project",
    "ai_product": "OCaml-TLS",
    "ai_version": "< 2.1.0",
    "ai_score": 9.1
}