Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1325 CNY

100%
Buy Us a Coffee

CVE-2026-49940— Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks

AI Predicted 5.3 Difficulty: Moderate EPSS 0.30% · P21

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
RRWONet::CIDR::Set≤ 0.20affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-49940

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks
Source: NVD (National Vulnerability Database)
Vulnerability Description
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1289
Source: NVD (National Vulnerability Database)
Vulnerability Title
Net::CIDR::Set 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Net::CIDR::Set是RRWO个人开发者的一个Perl网络地址管理库。 Net::CIDR::Set 0.20及之前版本存在安全漏洞，该漏洞源于接受非ASCII IP地址和网络掩码，Unicode数字如阿拉伯-印度一被接受但未正确解析为数字，可能导致网络掩码接受更大的网络。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
RRWONet::CIDR::Set 0 ~ 0.20 -

II. Public POCs for CVE-2026-49940

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-49940

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-49940 (1)

Vendor Pages for CVE-2026-49940 (1)

Same Patch Batch · RRWO · 2026-06-04 · 3 CVEs total

CVE-2026-49942Net::CIDR::Set versions through 0.20 for Perl did not validate network masks
CVE-2026-49941Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses

IV. Related Vulnerabilities

Same product: Net::CIDR::Set
Same vendor: RRWO
Same weakness: CWE-1289

V. Comments for CVE-2026-49940

No comments yet

Leave a comment