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TI-2026-02335 Aliases CVE-2026-2728GHSA-5gm9-622f-qcg5

Cross-site scripting in librenms

Priority MEDIUM 54CWE-79Published · Updated

Key facts

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

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

Summary

LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed librenms (librenms): 26.3.0librenms/librenms (Packagist): 26.3.0

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 26.3.026.3.0Patch availableCNA
—librenms/librenms (Packagist)25.12.0 to before 26.3.026.3.0Patch availableGHSA-5gm9-622f-qcg5
  • librenms Vendorlibrenms Affected before 26.3.0 Fixed in 26.3.0 Patch available CNA
  • librenms/librenms (Packagist) Vendor— Affected 25.12.0 to before 26.3.0 Fixed in 26.3.0 Patch available GHSA-5gm9-622f-qcg5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*before 26.3.0Vulnerablelibrenms
  • cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* Versions before 26.3.0 Vulnerable ·librenms

Remediation

  • Fix · CNA librenms (librenms) Fixed in 26.3.0
  • Fix · GHSA-5gm9-622f-qcg5 librenms/librenms (Packagist) Fixed in 26.3.0 Advisory →

Fixed in the same release

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

  • Release ·

    librenms 26.3.0

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2728
  2. 2026-10-03 Alias added: GHSA-5gm9-622f-qcg5

References

Exploit 1

Other 3

  • TI-2018-14479 LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the… CVSS 3.0CRITICAL 9.8
  • TI-2026-59134 LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion CVSS 4.0CRITICAL 9.2
  • TI-2022-03735 Insufficient Session Expiration in librenms/librenms CVSS 3.1CRITICAL 9.8
  • TI-2022-03252 Deserialization of Untrusted Data in librenms/librenms CVSS 3.1HIGH 8.8
  • TI-2026-05445 OS command injection in librenms CVSS 4.0HIGH 8.5
  • TI-2024-34235 LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command… CVSS 3.1CRITICAL 9.1
See all 105 →

Sources

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