CVE-2026-30480 LibreNMS CVE debrief

Who should care

Defenders and administrators of LibreNMS installations should assess exposure and prioritize patching. The vulnerability affects LibreNMS 22.11.0-23-gd091788f2 and is tracked by CVE-2026-30480. Security teams and vulnerability management teams should review the vulnerability and assess the risk to their organization.

Why it matters

CVE-2026-30480 is a Local File Inclusion (LFI) vulnerability in the NFSen module of LibreNMS. Authenticated attackers can include arbitrary PHP files via path traversal sequences. Defenders and administrators of LibreNMS installations should assess exposure and prioritize patching. The vulnerability's impact is currently limited by the requirement for authentication and the lack of detailed exploitation information.

• Potential arbitrary PHP file inclusion
• Possible exploitation requires authentication

Technical summary

CVE-2026-30480 is a Local File Inclusion (LFI) vulnerability in the NFSen module (nfsen.inc.php) of LibreNMS 22.11.0-23-gd091788f2. Authenticated attackers can include arbitrary PHP files from the server filesystem via path traversal sequences in the nfsen parameter. The vulnerability affects LibreNMS installations and requires authentication for exploitation. The official CVE Program record and NIST NVD detail page provide source-provided CVE metadata and vulnerability assessment. The vulnerability's impact is currently limited by the requirement for authentication and the lack of detailed exploitation information.

Defensive priority

Assess exposure, prioritize patching, and monitor for suspicious activity.

Recommended defensive actions

• Assess exposure and prioritize patching
• Monitor for suspicious activity
• Verify inventory and apply compensating controls if necessary
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Official CVE Program record and NIST NVD detail page provide vulnerability metadata. The CVE record was published on 2026-04-14T15:16:27.337Z and has not been modified since then. The vulnerability is a Local File Inclusion (LFI) in the NFSen module of LibreNMS. The official CVE Program record and NIST NVD detail page provide source-provided CVE metadata and vulnerability assessment.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.