LibreNMS has Stored XSS in Custom OID – unit parameter missing strip_tags()_CVE-2026-27016

{
    "lastseen": "",
    "description": "LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID. The Custom OID functionality lacks strip_tags() sanitization while other fields (name, oid, datatype) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping. This issue is fixed in version 26.2.0.",
    "published": "2026-02-20T01:34:11.241Z",
    "modified": "2026-02-20T01:34:11.241Z",
    "type": "cve",
    "title": "LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()",
    "source": "GitHub_M",
    "references": "https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g\nhttps://github.com/librenms/librenms/pull/19040\nhttps://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335\nhttps://github.com/librenms/librenms/releases/tag/26.2.0",
    "id": "CVE-2026-27016",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79",
        "CWE-116"
    ],
    "cvelist": null,
    "sourceData": "librenms librenms >= 24.10.0, < 26.2.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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": "librenms",
    "version": ">= 24.10.0, < 26.2.0",
    "vendor": "librenms",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}