TI-2026-71172 Aliases CVE-2026-109356 GHSA-h6hv-5g7p-j2pv

Missing authorization in LibreNMS port purge lets read-only users delete ports

LOW 23CWE-862Published 2026-10-12 · Updated 2026-10-26

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

LibreNMS before 26.9.0 is affected by a missing authorization flaw in PortsController::purge (CWE-862). Users with global read access can physically delete ports without having delete privileges. An attacker with a read-only account can send DELETE requests to /ports/purge with purge=all to irreversibly erase every deleted port on all visible devices.

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

Description from the CNA

LibreNMS before 26.9.0 contains a missing authorization vulnerability in PortsController::purge that allows global-read users to physically delete ports without delete privileges. Attackers with read-only accounts can send DELETE requests to /ports/purge, using purge=all to irreversibly erase every deleted port on all visible devices.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00192 8th percentileScored 2026-11-07

Fix Fixed librenms (librenms): 26.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
librenms	librenms	before 26.9.0	26.9.0	Patch available	CNA

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.

CPE	Versions	Role	Vendor
cpe:2.3:a:librenms:librenms::::::::	—	—	librenms

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

Remediation

LibreNMS fixed this in version 26.9.0. Upgrade LibreNMS to 26.9.0 or later.

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 · 2026-10-12
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-2026-71168 Stored cross-site scripting in LibreNMS wireless sensor descriptionsPriority MEDIUM 57
Show all 6 records →

Timeline

2026-10-12 Threatist record created from CVE-2026-109356
2026-10-12 Alias added: GHSA-h6hv-5g7p-j2pv
2026-10-26 CISA SSVC decision points changed

References

Advisory 1

GitHub Security Advisory (GHSA-9qcg-rgg9-mpjg)

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