Path Traversal Vulnerability in LibreNMS Affects NFSen Component
CVE-2026-109354

5.3MEDIUM

Key Information:

Vendor

Librenms

Status
Librenms
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109354?

LibreNMS prior to version 26.9.0 is susceptible to a path traversal vulnerability in the nfsen_channel_common.inc.php file. This flaw enables authenticated users to manipulate the channel parameter by injecting '../' sequences, allowing them to access restricted RRD data. An attacker gaining access to any NFSen-enabled device can exploit this vulnerability to retrieve NetFlow graphs and traffic information that go beyond their authorized permissions, heightening the risk of data leakage.

Affected Version(s)

librenms 0 < 26.9.0

librenms 26.9.0

References

https://github.com/librenms/librenms/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/librenms-before-26.9...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.