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CVE-2026-45191— Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass

Quick assessment

Affected
STIGTSP Net::CIDR::Lite
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-Lite是Stig个人开发者的一个用于处理CIDR地址的Perl模块。 Net-CIDR-Lite 0.24之前版本存在安全漏洞，该漏洞源于未正确处理CIDR掩码值中的多余零字符，可能导致IP ACL绕过。

AI Predicted 8.1 Difficulty: Easy EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
STIGTSP Net::CIDR::Lite < 0.24 affected
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I. Basic Information for CVE-2026-45191

Vulnerability Information
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Vulnerability Title
Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass. Mask forms like "/00" and "/01" pass validation and parse to the same prefix as their unpadded value. See also CVE-2026-45190.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1289
Source: CVE Program / CVE List V5
Vulnerability Title
Net-CIDR-Lite 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Net-CIDR-Lite是Stig个人开发者的一个用于处理CIDR地址的Perl模块。 Net-CIDR-Lite 0.24之前版本存在安全漏洞，该漏洞源于未正确处理CIDR掩码值中的多余零字符，可能导致IP ACL绕过。
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
STIGTSP Net::CIDR::Lite 0 ~ 0.24 -

II. Public POCs for CVE-2026-45191

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III. Intelligence Information for CVE-2026-45191

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Patches & Fixes for CVE-2026-45191 (1)

Vendor Advisories for CVE-2026-45191 (1)

Other References for CVE-2026-45191 (1)

IV. Related Vulnerabilities

Same product: Net::CIDR::Lite
Same vendor: STIGTSP
Same weakness: CWE-1289

V. Comments for CVE-2026-45191

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