CVE-2026-86287

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-07 19:17

Updated : 2026-09-08 19:20

NVD link : CVE-2026-86287

Mitre link : CVE-2026-86287

CVE.ORG link : CVE-2026-86287

JSON object : View

Products Affected

No product.

CWE

CWE-1287

Improper Validation of Specified Type of Input

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