CRITICAL 9.2 NVD
CVE-2026-86426
LibreNMS before 26.8.0 contains an authentication bypass vulnerability in the REST API that allows unauthenticated attackers to access protected endpoints by se
LibreNMS before 26.8.0 contains an authentication bypass vulnerability in the REST API that allows unauthenticated attackers to access protected endpoints by sending numeric values instead of string tokens. Attackers can exploit MySQL type coercion by sending small integers like 0 through 9 to match token hashes, gaining access to API functionality including device credentials and administrative features that enable remote code execution through alert templates.
References
- https://github.com/librenms/librenms/security/advisories/GHSA-cvq8-gqfq-3mvg
- https://www.vulncheck.com/advisories/librenms-before-26.8.0-authentication-bypass-via-api-
This critical severity vulnerability with a CVSS score of 9.2 was published on 2026-09-07 via NVD.
Risk Timeline
CVE Disclosed2026-09-07 · -1 days ago
Remediation Resources
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