{"id":"CVE-2026-27016","state":"PUBLISHED","title":"LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()","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.","publishedAt":"2026-02-20T01:34:11.241Z","updatedAt":"2026-02-20T15:34:34.942Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["librenms librenms"],"affected":[{"vendor":"librenms","product":"librenms","versions":[{"version":">= 24.10.0, < 26.2.0","status":"affected"}]}],"references":["https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g","https://github.com/librenms/librenms/pull/19040","https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335","https://github.com/librenms/librenms/releases/tag/26.2.0"],"weaknesses":["CWE-79","CWE-116"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/27xxx/CVE-2026-27016.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27016","state":"PUBLISHED","datePublished":"2026-02-20T01:34:11.241Z","dateUpdated":"2026-02-20T15:34:34.942Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-17T03:08:23.490Z"},"containers":{"cna":{"title":"LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()","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."}],"affected":[{"vendor":"librenms","product":"librenms","versions":[{"version":">= 24.10.0, < 26.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g","name":"https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/librenms/librenms/pull/19040","name":"https://github.com/librenms/librenms/pull/19040","tags":["x_refsource_MISC"]},{"url":"https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335","name":"https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335","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"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-116","lang":"en","description":"CWE-116: Improper Encoding or Escaping of Output","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-02-20T01:34:11.241Z"},"source":{"advisory":"GHSA-fqx6-693c-f55g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-20T15:26:32.832016Z","id":"CVE-2026-27016","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-20T15:34:34.942Z"}}]}}}