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TI-2026-59135 Aliases CVE-2026-86427GHSA-j7jc-m6xg-rrcw

LibreNMS before 26.8.0 Argument Injection via graph_title

Priority MEDIUM 41CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00605 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed librenms (librenms): 26.8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
librenmslibrenmsbefore 26.8.026.8.0Patch availableCNA
  • librenms Vendorlibrenms Affected before 26.8.0 Fixed in 26.8.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*before 26.8.0Vulnerablelibrenms
  • cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* Versions before 26.8.0 Vulnerable ·librenms

Remediation

  • Fix · CNA librenms (librenms) Fixed in 26.8.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    librenms 26.8.0

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-59134 LibreNMS before 26.8.0 Authentication Bypass via API Token Type ConfusionPriority HIGH 75
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86427
  2. 2026-10-03 Alias added: GHSA-j7jc-m6xg-rrcw

References

Exploit 1

  • TI-2018-14479 LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the… CVSS 3.0CRITICAL 9.8
  • TI-2026-59134 LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion CVSS 4.0CRITICAL 9.2
  • TI-2022-03735 Insufficient Session Expiration in librenms/librenms CVSS 3.1CRITICAL 9.8
  • TI-2022-03252 Deserialization of Untrusted Data in librenms/librenms CVSS 3.1HIGH 8.8
  • TI-2026-05445 OS command injection in librenms CVSS 4.0HIGH 8.5
  • TI-2024-34235 LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command… CVSS 3.1CRITICAL 9.1
See all 105 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences