PT-2026-86792 · Git+1 · Librenms

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CVE-2026-86426

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Published

2026-09-07

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Updated

2026-09-12

CVSS v4.0

9.2

Critical

VectorAV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.

Exploit

Fix

RCE

Improper Authentication

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Weakness Enumeration

Related Identifiers

CVE-2026-86426
GHSA-CVQ8-GQFQ-3MVG

Affected Products

Librenms