FKIE_CVE-2026-27016

Vulnerability from fkie_nvd - Published: 2026-02-20 02:16 - Updated: 2026-02-20 16:22
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335Patch
security-advisories@github.comhttps://github.com/librenms/librenms/pull/19040Issue Tracking
security-advisories@github.comhttps://github.com/librenms/librenms/releases/tag/26.2.0Product, Release Notes
security-advisories@github.comhttps://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55gThird Party Advisory
Impacted products
Vendor Product Version
librenms librenms *
To clipboard 

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    {
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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5DF70D72-DD59-426A-8938-18E877C05530",
              "versionEndExcluding": "26.2.0",
              "versionStartIncluding": "24.10.0",
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            }
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-27016",
  "lastModified": "2026-02-20T16:22:29.830",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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  "published": "2026-02-20T02:16:55.140",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335"
    },
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-116"
        }
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      "source": "security-advisories@github.com",
      "type": "Primary"
    },
    {
      "description": [
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          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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