CVE-2026-45190
Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass
Description
Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass. Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result. Example: my $cidr = Net::CIDR::Lite->new(); $cidr->add("::1\n/128"); $cidr->find("::1a"); # incorrectly returns true See also CVE-2026-45191.
INFO
Published Date :
May 10, 2026, 9:16 p.m.
Last Modified :
July 24, 2026, 1:10 p.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Net::CIDR::Lite to version 0.24 or later.
- Validate IP address and CIDR mask inputs thoroughly.
- Remove trailing newlines from IP inputs.
- Ensure inputs use only ASCII digits.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45190.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45190 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45190
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45190 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45190 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: Net::CIDR::Lite de STIGTSP, Description: Las versiones de Net::CIDR::Lite anteriores a la 0.24 para Perl no validan correctamente las entradas de dirección IP y máscara CIDR, lo que puede permitir la omisión de ACL de IP. Las entradas que contienen un salto de línea final o caracteres de dígitos no ASCII pasan los validadores, pero luego son recodificadas por el analizador a una dirección diferente de la que especifica la cadena de entrada. find() y bin_find() pueden coincidir o no con direcciones como resultado. Ejemplo: my $cidr = Net::CIDR::Lite -> new(); $cidr -> add('::1\n/128'); $cidr -> find('::1a'); # devuelve true incorrectamente Véase también CVE-2026-45191. -
CVE Modified by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/stigtsp/Net-CIDR-Lite', 'vendor': 'STIGTSP', 'product': 'Net::CIDR::Lite', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.24', 'versionType': 'custom'}], 'packageName': 'Net-CIDR-Lite', 'programFiles': ['Lite.pm'], 'collectionURL': 'https://cpan.org/modules', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': 'Net::CIDR::Lite::add'}, {'name': 'Net::CIDR::Lite::_pack_ipv4'}, {'name': 'Net::CIDR::Lite::_pack_ipv6'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45190', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-12T14:30:52.674727Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
May. 10, 2026
Action Type Old Value New Value Added Description Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass. Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result. Example: my $cidr = Net::CIDR::Lite->new(); $cidr->add("::1\n/128"); $cidr->find("::1a"); # incorrectly returns true See also CVE-2026-45191. Added CWE CWE-1289 Added Reference https://github.com/stigtsp/Net-CIDR-Lite/commit/ca9542adec87110556601d7ce48381ea8d13e692.patch Added Reference https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes Added Reference https://www.cve.org/CVERecord?id=CVE-2026-45191