CVE-2026-109352

MEDIUM 6.1

LibreNMS before 26.9.0 Stored XSS via wireless sensor description

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	librenms
Product	librenms
Published	Oct 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

librenms / librenms

0 < 26.9.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/librenms/librenms/security/advisories/GHSA-ffjc-4fr5-47c6 vulncheck.com: https://www.vulncheck.com/advisories/librenms-before-26.9.0-stored-xss-via-wireless-sensor-description