Medium severity · published Oct 12, 2026
CVE-2026-109352
LibreNMS before 26.9.0 Stored XSS via wireless sensor description
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in includes/html/pages/device/wireless.inc.php, which echoes wireless sensor sensor_descr values, populated from SNMP DisplayString fields during discovery, into HTML without escaping. Attackers controlling a monitored device's SNMP agent can set values such as AI-AP-MIB::aiSSID to malicious JavaScript that executes when authenticated users view the device's Wireless tab, enabling session hijacking.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109352
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109352
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-ffjc-4fr5-47c6
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.9.0-stored-xss-via-wireless-sensor-description
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