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High severity8.8NVD Advisory· Published Sep 7, 2026· Updated Sep 18, 2026

CVE-2026-86427

CVE-2026-86427

Description

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.

Affected products

2
  • Librenms/Librenms2 versions
    cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*range: <26.8.0
    • (no CPE)range: <26.8.0

Patches

Vulnerability mechanics

References

2

News mentions

0

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