PT-2026-39539 · Cpan+2 · Net-Cidr-Lite+2

Stig Tsp + 1 · Published 2026-05-10 · Updated 2026-06-18 · CVE-2026-45191

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Name of the Vulnerable Software and Affected Versions Net::CIDR::Lite versions prior to 0.24

Description Improper validation of CIDR mask values allows extraneous zero characters to be processed. Mask forms such as "/00" and "/01" pass validation and are parsed as the same prefix as their unpadded equivalents, which may lead to an IP Access Control List (ACL) bypass.

Recommendations Update to version 0.24 or later.

Exploit

Fix

Weakness Enumeration

CWE-1289

Related Identifiers

CVE-2026-45191

OPENSUSE-SU-2026:10780-1

SUSE-SU-2026:2113-1

USN-8453-1

Affected Products

Linuxmint

Net-Cidr-Lite

Ubuntu

References · 30

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45191.json · Exploit
• https://github.com/stigtsp/Net-CIDR-Lite/commit/24e2c439ec405e5256024b9acefd4f7008c5ed0c.patch · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45191 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45191 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-45191 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45191 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-45191 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45190 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-45191 · Security Note
• https://ubuntu.com/security/CVE-2026-45190 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8453-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10780-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45191 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-45191 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8453-1 · Vendor Advisory