Vulnerability Description
Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rrwo | Net\ | < 0.21, \ |
Related Weaknesses (CWE)
References
- https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changesRelease Notes
- https://nvd.nist.gov/vuln/detail/CVE-2025-40911Third Party AdvisoryUS Government Resource
- https://nvd.nist.gov/vuln/detail/CVE-2026-45191Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2026-49942?
CVE-2026-49942 is a vulnerability with a CVSS score of 7.3 (HIGH). Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, whi...
How severe is CVE-2026-49942?
CVE-2026-49942 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49942?
Check the references section above for vendor advisories and patch information. Affected products include: Rrwo Net\.