TI-2026-36790 Aliases CVE-2026-49941 GHSA-wvxw-q92g-9ghf

Uncontrolled recursion in RRWO Net::CIDR::Set

LOW 39CWE-1287Published 2026-06-04 · Updated 2026-06-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-674.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00329 26th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
RRWO	Net::CIDR::Set	up to 0.20	—	No fix listed	CNA

Net::CIDR::Set VendorRRWO Affected up to 0.20 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:rrwo:net\:\:cidr\:\:set::::::perl::*	cidr\	Vulnerable	RRWO

cpe:2.3:a:rrwo:net\:\:cidr\:\:set:*:*:*:*:*:perl:*:* Versions cidr\ Vulnerable ·RRWO

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-49941
2026-10-03 Alias added: GHSA-wvxw-q92g-9ghf

References

Advisory 1

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

Other 1

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

TI-2026-36791 Net::CIDR::Set versions through 0.20 for Perl did not validate network masks CVSS 3.1HIGH 7.3
TI-2026-36789 Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences