Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint_CVE-2026-25892

{
    "lastseen": "",
    "description": "Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.",
    "published": "2026-02-09T21:26:45.224Z",
    "modified": "2026-02-09T21:26:45.224Z",
    "type": "cve",
    "title": "Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint",
    "source": "GitHub_M",
    "references": "https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh\nhttps://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3\nhttps://github.com/vrana/adminer/releases/tag/v5.4.2",
    "id": "CVE-2026-25892",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20"
    ],
    "cvelist": null,
    "sourceData": "vrana adminer >= 4.6.2, < 5.4.2",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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": "adminer",
    "version": ">= 4.6.2, < 5.4.2",
    "vendor": "vrana",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}