CVE-2026-49942: RRWO Net::CIDR::Set

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks

CVSS 7.3 HighEPSS 0.0030 · 22nd percentile

Published by the CVE Program (CNA: CPANSec) at 4 Jun 2026, 16:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
RRWO	Net::CIDR::Set Package name: Net-CIDR-Set https://cpan.org/modules	affected 0.20 and earlier custom Other versions: unaffected

Identifiers

CVE-2026-49942

CNA

CPANSec

Weakness (CWE)

CWE-1289

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.3	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes release-notes
nvd.nist.gov/vuln/detail/CVE-2025-40911 related
nvd.nist.gov/vuln/detail/CVE-2026-45191 related

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.