CVE-2026-86427 (GCVE-0-2026-86427)

Vulnerability from cvelistv5 – Published: 2026-09-07 12:53 – Updated: 2026-09-10 15:04
VLAI
Title
LibreNMS before 26.8.0 Argument Injection via graph_title
Summary
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.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:24 UTC
CWE
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6748 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
librenms librenms Affected: 0 , < 26.8.0 (semver)
Unaffected: 26.8.0 (semver)
    cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-23 00:00
Show details on NVD website
To clipboard 

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