SEPTEMBER 17, 2026
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Case File

CVE-2026-86287

HIGH · CVSS 7.5 EPSS 0.39% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-07 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Net::IP::LPM versions prior to 1.12 for Perl are vulnerable to accepting malformed prefix lengths, including non-numeric and non-ASCII values, which are incorrectly processed as 0. This flaw can lead to a compromised IP address filtering mechanism, where allow-lists permit all addresses and deny-lists block all addresses, effectively nullifying access controls. Organizations using affected versions should prioritize patching to prevent potential unauthorized access and security breaches.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-86287
Severity
HIGH
CVSS
7.5
EPSS
0.39%

Original NVD Description

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths. Non-numeric and non-ASCII prefix lengths are accepted and treated as 0. Integers over 31 bits are silently truncated. A single malformed mask will poison the lookup table. The result is that the lookup will silently succeed for every address. An allow-list will allow every address, and a deny-list will block every address.