CVE-2026-49941
Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses
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.
INFO
Published Date :
June 4, 2026, 5:16 p.m.
Last Modified :
June 8, 2026, 4:37 p.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Net::CIDR::Set to version 0.21 or later.
- Validate IP address inputs rigorously.
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-2026-49941.
| URL | Resource |
|---|---|
| https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes | Release Notes |
| http://www.openwall.com/lists/oss-security/2026/06/04/11 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-49941 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-2026-49941
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-2026-49941 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-49941 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.
-
Initial Analysis by [email protected]
Jun. 08, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:rrwo:net::cidr::set:*:*:*:*:*:perl:*:* versions up to (excluding) 0.21 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/06/04/11 Types: Mailing List, Third Party Advisory Added Reference Type CPANSec: https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes Types: Release Notes -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 04, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/06/04/11 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 04, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jun. 04, 2026
Action Type Old Value New Value Added 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. Added CWE CWE-674 Added CWE CWE-1287 Added Reference https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes