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Back to active CVEs
Medium · CVSS 5.3CVE-2026-109355

LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node ListCVE-2026-109355

Answer in brief

CVE-2026-109355 records a Medium severity (CVSS 5.3) vulnerability in LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List. The current sources do not mark it as known exploited. The current feed maps librenms/librenms (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 12, 2026Updated Oct 12, 2026Source checked Oct 12, 2026First seen by HOL Oct 12, 2026Material review Oct 12, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps librenms/librenms (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
librenms/librenmsgeneric>=0 <26.9.026.9.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for librenms/librenms.
  2. 2Review the reported fix. Update librenms/librenms to 26.9.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in get_oxidized_nodes_list() that renders Oxidized API fields and SNMP sysName unescaped. Attackers controlling the Oxidized response or a device's SNMP sysName can inject script that executes in browsers of users viewing the Tools Oxidized page.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • LibreNMS before 26.9.0 LDAP Filter Injection Authentication Bypass via Authorization HeaderSame librenms/librenms package
  • WordPress Quiz And Survey Master plugin <= 11.2.7 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Element Pack Elementor Addons plugin <= 8.8.8 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Premium Addons for Elementor plugin <= 4.11.110 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • Netcore NR268 Web UI l7_call_board_user_set.cgi eval cross site scriptingAlso CWE-79
  • Cross-site scripting in Progress MarkLogic ServerAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 12, 2026
References
2 linked sources
Open source record