CVE-2026-86427LibreNMS before 26.8.0 Argument Injection via graph_title
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-77
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
librenms librenms librenms:librenms (from the name) | before 26.8.0; 26.8.0 not affected | CNA record |
librenms librenms librenms:librenms | before 26.8.0 | NVD |
References
- https://github.com/librenms/librenms/security/advisories/GHSA-3hvv-wxpw-cx83vendor-advisory, exploit, mitigation
- https://www.vulncheck.com/advisories/librenms-before-26.8.0-argument-injection-via-graph-titlethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.