CVE-2026-49942
Last modified
CVE-2026-49942 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Rrwo | Net\ | < 0.21 | Cidr\ |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-40911Third Party Advisory, US Government Resource
- https://nvd.nist.gov/vuln/detail/CVE-2026-45191Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-49942?
How severe is CVE-2026-49942?
How do I fix CVE-2026-49942?
Are you affected by CVE-2026-49942?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST