Auth bypass in Librenms
CVE-2026-108715
LibreNMS through 26.9.1.1 contains an authorization bypass vulnerability in includes/html/graphs/smokeping/auth.inc.php that checks the src probe device instead of the rendered target device. Restricted users permitted on a probe device can request smokeping_in or smokeping_out graphs with arbitrary device ids to view latency data and enumerate device names.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind/librenms-smokeping-graph-src-device-auth-confusion (third-party-advisory)
- github.com/librenms/librenms/blob/26.9.1.1/includes/html/graphs/smokeping/auth… (technical-description)
- github.com/librenms/librenms/blob/26.9.1.1/LibreNMS/Util/Graph.php (technical-description)
- github.com/librenms/librenms (product)
- www.vulncheck.com/advisories/librenms-through-26.9.1.1-authorization-bypass-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108715?
- CVE-2026-108715 is a medium-severity vulnerability in Librenms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-10-11.
- How severe is CVE-2026-108715?
- Medium severity. CVSS v3 base score is 4.3 out of 10.