CVE-2026-86287
High · 7.5CVSS
7.5
EPSS
0.6%
Published
Sep 7, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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