CVE-2026-86426 Details.
LibreNMS <= 26.7.0 - Unauthenticated API Access
Atlas does not check this one. Needs a scripted sequence.
This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one.
About CVE-2026-86426. What It Means.
LibreNMS <= 26.8.0 contains an authentication bypass caused by MySQL type coercion in the REST API token validation, letting unauthenticated attackers access protected endpoints and execute remote code via alert templates.
Affected Product. What Is Hit.
- Vendor
- librenms
- Product
- LibreNMS
References. Where To Read More.
FAQ
Common Questions.
LibreNMS <= 26.7.0 - Unauthenticated API Access. LibreNMS <= 26.8.0 contains an authentication bypass caused by MySQL type coercion in the REST API token validation, letting unauthenticated attackers access protected endpoints and execute remote code via alert templates.
No. This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one. The facts about CVE-2026-86426 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-86426 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update LibreNMS to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-86426. Atlas does not run a check for it, so nothing here says whether a particular site is affected.