{"id":"CVE-2026-84189","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-84189","summary":"LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig…","details":"LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig page without applying htmlspecialchars(). An administrator who points the Oxidized URL at an attacker-controlled server (SSRF) can cause it to return malicious JSON, resulting in stored/persistent cross-site scripting affecting all users who view any device's showconfig tab. Fixed in 26.7.0.","published":"2026-09-01T12:17:48.287","modified":"2026-09-01T12:17:48.287","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidized-api"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T12:17:48.287"}}