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

Quick assessment

Affected
RRWO Net::CIDR::Set
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于未验证IP地址，add方法调用_encode方法解析地址，若参数不是格式良好的IP地址则导致无限递归，可能导致拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
RRWO Net::CIDR::Set ≤ 0.20 affected
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I. Basic Information for CVE-2026-49941

Vulnerability Information
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Vulnerability Title
Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses
Source: CVE Program / CVE List V5
Vulnerability Description
Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses. The add method called the _encode method to parse addresses. If the addresses did not look like netmasks or network ranges, then they were assumed to single IP addresses and passed back to itself as a 32-bit or 128-bit netmask. If the argument was not a well-formed IP address, then this would lead to indefinite recursion. An attacker could use this to cause a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1287
Source: CVE Program / CVE List V5
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，该漏洞源于未验证IP地址，add方法调用_encode方法解析地址，若参数不是格式良好的IP地址则导致无限递归，可能导致拒绝服务。
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

Vendor Product Affected Versions CPE Subscribe
RRWO Net::CIDR::Set 0 ~ 0.20 -

II. Public POCs for CVE-2026-49941

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III. Intelligence Information for CVE-2026-49941

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Vendor Pages for CVE-2026-49941 (1)

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

CVE-2026-49940 Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks
CVE-2026-49942 Net::CIDR::Set versions through 0.20 for Perl did not validate network masks

IV. Related Vulnerabilities

Same product: Net::CIDR::Set
Same vendor: RRWO
Same weakness: CWE-1287

V. Comments for CVE-2026-49941

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