Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths
Priority MEDIUM 40CWE-1287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00609 49th percentileScored 2026-11-07
Fix Fixed Net-IP-LPM: 1.12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Net-IP-LPM | before 1.12 | 1.12 | Patch available | CNA |
- Net-IP-LPM Vendor— Affected before 1.12 Fixed in 1.12 Patch available CNA
Remediation
- Fix · CNA Net-IP-LPM Fixed in 1.12
Timeline
- 2026-10-02 Threatist record created from CVE-2026-86287
- 2026-10-03 Alias added: GHSA-456r-qjr2-xph9
References
Sources
- CVE-2026-86287 · CVE Program
- CVE-2026-86287 · NVD
- FIRST EPSS
- GHSA-456r-qjr2-xph9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences