# CVE-2026-86287

## Summary

- **CVE ID:** CVE-2026-86287
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-1287
- **Published:** Sep 7, 2026
- **Last 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.

## Affected Products

- Unknown product (0)

## References

- [CNA](https://github.com/robrwo/perl-Net-IP-LPM/commit/814f8baa85537827db8c3b3d251e48db7aca318f.patch)
- [CNA](https://metacpan.org/release/RRWO/Net-IP-LPM-1.12/changes)
- [CVE](http://www.openwall.com/lists/oss-security/2026/09/07/1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 31.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._