CVE-2026-26991

{"id": "CVE-2026-26991", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 1.7}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-02-20T03:15:59.977", "references": [{"url": "https://github.com/librenms/librenms/commit/64b31da444369213eb4559ec1c304ebfaa0ba12c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/librenms/librenms/pull/19041", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/librenms/librenms/releases/tag/26.2.0", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/librenms/librenms/security/advisories/GHSA-5pqf-54qp-32wx", "tags": ["Exploit", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the device group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a device group, an HTTP POST request is sent to the Request-URI \"/device-groups\". The name of the newly created device group is stored in the value of the name parameter. After the device group is created, the entry is displayed along with relevant buttons such as Rediscover Devices, 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 y anteriores, el nombre del grupo de dispositivos no est\u00e1 saneado, permitiendo a atacantes con privilegios de administrador realizar ataques de Cross-Site Scripting (XSS) almacenado. Cuando un usuario a\u00f1ade un grupo de dispositivos, se env\u00eda una solicitud HTTP POST a la Request-URI '/device-groups'. El nombre del grupo de dispositivos reci\u00e9n creado se almacena en el valor del par\u00e1metro name. Despu\u00e9s de que se cree el grupo de dispositivos, la entrada se muestra junto con botones relevantes como Rediscover Devices, Edit y Delete. Este problema ha sido solucionado en la versi\u00f3n 26.2.0."}], "lastModified": "2026-02-20T16:21:10.527", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C0838E1C-0369-4B31-9B51-83A5D2A7CAC9", "versionEndExcluding": "26.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}