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TI-2026-71168 Aliases CVE-2026-109352GHSA-4f47-pwgv-rph4

Stored cross-site scripting in LibreNMS wireless sensor descriptions

Priority MEDIUM 57CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

LibreNMS before 26.9.0 contains a stored cross-site scripting flaw in the device Wireless tab, where wireless sensor descriptions taken from SNMP DisplayString values are written into HTML without escaping (CWE-79). An attacker who controls a monitored device's SNMP agent can set a sensor value to malicious JavaScript that runs when authenticated users view that device's Wireless tab, which enables session hijacking. The attack requires user interaction by an authenticated user.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0024 15th percentileScored 2026-11-07
Fix Fixed librenms (librenms): 26.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
librenmslibrenmsbefore 26.9.026.9.0Patch availableCNA
  • librenms Vendorlibrenms Affected before 26.9.0 Fixed in 26.9.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*——librenms
  • cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* Versions — — ·librenms

Remediation

Upgrade LibreNMS to version 26.9.0 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA librenms (librenms) Fixed in 26.9.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    librenms 26.9.0

    6 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-71173 LDAP filter injection in LibreNMS allows authentication bypassPriority HIGH 75
    • TI-2026-71169 SQL injection in LibreNMS notifications lets users read password hashesPriority MEDIUM 64
    • TI-2026-71170 Path traversal in LibreNMS lets users read unauthorized RRD dataPriority LOW 24
    Show all 6 records →

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109352
  2. 2026-10-12 Alias added: GHSA-4f47-pwgv-rph4
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: LOW → MEDIUM

References

Advisory 1

  • TI-2018-14479 LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the… CVSS 3.0CRITICAL 9.8
  • TI-2026-71173 LDAP filter injection in LibreNMS allows authentication bypass CVSS 4.0CRITICAL 9.2
  • TI-2026-59134 LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion CVSS 4.0CRITICAL 9.2
  • TI-2026-57885 LibreNMS before 26.7.0 Stored XSS via Oxidized API CVSS 4.0CRITICAL 9.2
  • TI-2022-03735 Insufficient Session Expiration in librenms/librenms CVSS 3.1CRITICAL 9.8
  • TI-2026-57886 LibreNMS before 26.5.0 Remote Code Execution via AboutController CVSS 4.0HIGH 8.7
See all 123 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences