{"id":"CVE-2026-27016","summary":"LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()","details":"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.","aliases":["GHSA-fqx6-693c-f55g"],"modified":"2026-08-12T03:51:32.892793334Z","published":"2026-02-20T01:34:11.241Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-116","CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27016.json"},"references":[{"type":"WEB","url":"https://github.com/librenms/librenms/releases/tag/26.2.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27016.json"},{"type":"ADVISORY","url":"https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27016"},{"type":"FIX","url":"https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335"},{"type":"FIX","url":"https://github.com/librenms/librenms/pull/19040"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/librenms/librenms","events":[{"introduced":"a625d1ef0b66e093414d8d440f8b5f4f85baadfa"},{"fixed":"eeaa05618c22140d087739097b217800b0d6621f"},{"fixed":"3bea263e02441690c01dea7fa3fe6ffec94af335"}],"database_specific":{"cpe":"cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"24.10.0"},{"fixed":"26.2.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["26.1.0","25.12.0","25.11.0","25.10.0","25.9.0","25.8.0","25.7.0","25.6.0","25.5.0","25.4.0","25.3.0","25.2.0","25.1.0","24.12.0","24.11.0","24.10.1","24.10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27016.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}