CVE-2026-86427

LibreNMS before 26.8.0 contains an argument injection vulnerability in the graph_title parameter that allows authenticated attackers to inject arbitrary rrdtool arguments by breaking out of double-quote escaping. Attackers can inject DEF and LINE arguments to read RRD files from unauthorized devices, or use newline injection to execute arbitrary rrdtool commands, bypassing per-device authorization checks.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/librenms/librenms/security/advisories/GHSA-3hvv-wxpw-cx83	Exploit Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/librenms-before-26.8.0-argument-injection-via-graph-title	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

History

18 Sep 2026, 18:33

Type	Values Removed	Values Added
References	~~() https://github.com/librenms/librenms/security/advisories/GHSA-3hvv-wxpw-cx83 -~~	() https://github.com/librenms/librenms/security/advisories/GHSA-3hvv-wxpw-cx83 - Exploit, Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/librenms-before-26.8.0-argument-injection-via-graph-title -~~	() https://www.vulncheck.com/advisories/librenms-before-26.8.0-argument-injection-via-graph-title - Third Party Advisory
CPE		cpe:2.3:a:librenms:librenms::::::::
First Time		Librenms Librenms librenms

Information

Published : 2026-09-07 13:20

Updated : 2026-09-18 18:33

NVD link : CVE-2026-86427

Mitre link : CVE-2026-86427

CVE.ORG link : CVE-2026-86427

JSON object : View

Products Affected

librenms

librenms

CWE

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')

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