{"id":"CVE-2026-26987","aliases":["EUVD-2026-8401","GHSA-gqx7-99jw-6fpr"],"status":"published","title":"LibreNMS affected by reflected XSS via email field","description":"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to  Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00336,"percentile":0.27376,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-02-18T22:07:06Z","modified":"2026-10-28T02:30:21Z","fixes":[{"ecosystem":"Packagist","package":"librenms/librenms","fixed_in":["26.2.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"librenms/librenms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.2.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"librenms/librenms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.2.0"}]}],"versions":["1.19","1.20","1.20.1","1.21","1.22","1.22.01","1.23","1.24","1.25","1.26","1.27","1.28","1.29","1.30","1.30.01","1.31","1.31.01","1.31.02","1.31.03","1.32","1.32.01","1.33","1.33.01","1.34","1.35","1.36","1.36.01","1.37","1.38","1.39","1.40","1.41","1.42","1.42.01","1.43","1.44","1.45","1.46","1.47","1.48","1.48.1","1.49","1.50","1.50.1","1.51","1.52","1.53","1.53.1","1.54","1.55","1.56","1.57","1.58","1.58.1","1.59","1.60","1.61","1.62","1.62.1","1.62.2","1.63","1.64","1.64.1","1.65","1.65.1","1.66","1.67","1.68","1.69","1.70.0","1.70.1","21.1.0","21.10.0","21.10.1","21.10.2","21.11.0","21.12.0","21.12.1","21.2.0","21.3.0","21.4.0","21.5.0","21.5.1","21.6.0","21.7.0","21.8.0","21.9.0","21.9.1","22.1.0","22.10.0","22.11.0","22.12.0","22.2.0","22.2.1","22.2.2","22.3.0","22.4.0","22.4.1","22.5.0","22.6.0","22.7.0","22.8.0","22.9.0","23.1.0","23.1.1","23.10.0","23.11.0","23.2.0","23.4.0","23.4.1","23.5.0","23.6.0","23.7.0","23.8.0","23.8.1","23.8.2","23.9.0","23.9.1","24.1.0","24.10.0","24.10.1","24.11.0","24.12.0","24.2.0","24.3.0","24.4.0","24.4.1","24.5.0","24.6.0","24.7.0","24.8.0","24.8.1","24.9.0","24.9.1","25.1.0","25.10.0","25.11.0","25.12.0","25.2.0","25.3.0","25.4.0","25.5.0","25.6.0","25.7.0","25.8.0","25.9.0","25.9.1","26.1.0","26.1.1"]}],"products":[{"vendor":"librenms","product":"librenms"}],"references":[{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-gqx7-99jw-6fpr","tags":["x_refsource_CONFIRM","Exploit","Third Party Advisory","advisory","web"]},{"url":"https://github.com/librenms/librenms/pull/19038","tags":["x_refsource_MISC","Issue Tracking","fix","web"]},{"url":"https://github.com/librenms/librenms/commit/8e626b38ef92e240532cdac2ac7e38706a71208b","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/librenms/librenms/releases/tag/26.2.0","tags":["x_refsource_MISC","Product","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26987","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-gqx7-99jw-6fpr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26987.json","tags":["advisory"]},{"url":"https://github.com/librenms/librenms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-26987","title":"LibreNMS affected by reflected XSS via email field","description":"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to  Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.","status":"published","published":"2026-02-20T01:11:13.925Z","modified":"2026-02-20T15:35:18.059Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-8401","description":"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to  Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.","status":"published","published":"2026-02-20T01:11:13Z","modified":"2026-02-20T15:35:18Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:48:37.056368Z"}],"ghsa":[{"id":"GHSA-gqx7-99jw-6fpr","title":"LibreNMS affected by reflected xss via email field ","description":"### Summary\nreflected xss via email field \n\n### Details\n 1. visit `http://127.0.0.1/settings/alerting/email`\n 2. in the email address input but this payload \n `\u003cimg src=1 onerror=alert(document.cookie)\u003e` \n3. notice the alert \n### PoC\n- video attached with the report\nhttps://github.com/user-attachments/assets/c1b443f5-85c6-4545-b04f-def06d82b42e\n\n\n### Impact\ncan lead to ATO","status":"published","published":"2026-02-18T22:07:06Z","modified":"2026-02-20T16:48:20Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:39:26.881079Z"}],"nvd":[{"id":"CVE-2026-26987","description":"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to  Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.","status":"published","published":"2026-02-20T02:16:54.383Z","modified":"2026-06-17T10:26:29.577Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:06.63895Z"}],"osv":[{"id":"CVE-2026-26987","title":"LibreNMS affected by reflected XSS via email field","description":"LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to  Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.","status":"published","published":"2026-02-20T01:11:13.925Z","modified":"2026-10-28T02:30:21.632088702Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:59.80315Z"},{"id":"GHSA-gqx7-99jw-6fpr","title":"LibreNMS affected by reflected xss via email field ","description":"### Summary\nreflected xss via email field \n\n### Details\n 1. visit `http://127.0.0.1/settings/alerting/email`\n 2. in the email address input but this payload \n `\u003cimg src=1 onerror=alert(document.cookie)\u003e` \n3. notice the alert \n### PoC\n- video attached with the report\nhttps://github.com/user-attachments/assets/c1b443f5-85c6-4545-b04f-def06d82b42e\n\n\n### Impact\ncan lead to ATO","status":"published","published":"2026-02-18T22:07:06Z","modified":"2026-02-20T17:04:28.582087Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:48.191583Z"}]}}