CVE-2026-86287

HighCVSS 7.5/10Last modified Sep 8, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1287

Affected software

No affected versions have been published.

Timeline

Published: Sep 7, 2026
Last modified: Sep 8, 2026
NVD status: Deferred

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