CVE-2026-84189

Description

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.

CVSS Vector

References

• https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
• https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidized-api