CVE-2026-86287

Published: Sep 7, 2026Modified: Sep 8, 2026Deferred

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Related CWEs

CWE-1287

Improper Validation of Specified Type of Input

The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

References (3)

https://github.com/robrwo/perl-Net-IP-LPM/commit/814f8baa85537827db8c3b3d251e48db7aca318f.patch

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/RRWO/Net-IP-LPM-1.12/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

http://www.openwall.com/lists/oss-security/2026/09/07/1

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.