High severity · published Sep 1, 2026
CVE-2026-84189
LibreNMS before 26.7.0 Stored XSS via Oxidized API
8.1
CVSS
0.4%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.7.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84189
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84189
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidized-api
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