CVE-2026-49941Disclosure(rrwo / net\)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

rrwo CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

http://www.openwall.com/lists/oss-security/2026/06/04/11

Other references

https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes

Weakness type (CWE)

CWE-674CWE-1287

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

net\

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Affected systems

Vendors

rrwo

Products

net\

1 version affected across 1 product

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets3 URLs

By indicator

Full discourse1 post

Open Source Security mailing list@oss_security137d
Disclosure
Perl CPAN Net::CIDR::Set through 0.20 CVE-2026-49940: accept non-ASCII IP addresses and netmasks https://www.openwall.com/lists/oss-security/2026/06/04/10 CVE-2026-49941: did not validate IP addresses https://www.openwall.com/lists/oss-security/2026/06/04/11 CVE-2026-49942: did not validate network masks https://www.openwall.com/lists/oss-security/2026/06/04/12
Post summary
The CPAN Net::CIDR::Set module (up to 0.20) is susceptible to three CVEs that allow handling of non-ASCII IPs/netmasks and inadequate validation of IP addresses and network masks. These vulnerabilities were announced via Openwall mailing list posts.
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CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	rrwo	net\	\	-	-

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