CVE-2026-49940
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
CVE-2026-49940- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1289
- Updated
- 2026-11-02
EUVDEUVD-2026-34297
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
EUVD-2026-34297- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hpv8-77xm-27wx
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. ...
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
GHSA-hpv8-77xm-27wx- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1289
- Updated
- 2026-11-02
NVD
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
CVE-2026-49940- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1289
- Updated
- 2026-11-02
OSV
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.
Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
CVE-2026-49940- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1289
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-49940
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
DEBIAN-CVE-2026-49940- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-49940
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Record
UBUNTU-CVE-2026-49940- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2026:10951-1 No score
perl-Net-CIDR-Set-0.210.0-1.1 on GA media
These are all security issues fixed in the perl-Net-CIDR-Set-0.210.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:10951-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libnet-cidr-set-perlDebian:12 |
All versions, plus listed versions 0.13-40.13-50.15-10.19-10.20-10.21-10.22-10.23-1 |
None known |
libnet-cidr-set-perlDebian:13 |
before 0.15-1+deb13u1, plus listed versions 0.15-1 |
0.15-1+deb13u1 |
libnet-cidr-set-perlDebian:14 |
before 0.21-1, plus listed versions 0.15-10.19-10.20-1 |
0.21-1 |
libnet-cidr-set-perlUbuntu:20.04:LTS |
All versions, plus listed versions 0.13-2 |
None known |
libnet-cidr-set-perlUbuntu:22.04:LTS |
All versions, plus listed versions 0.13-3 |
None known |
libnet-cidr-set-perlUbuntu:24.04:LTS |
All versions, plus listed versions 0.13-40.13-5 |
None known |
libnet-cidr-set-perlUbuntu:25.10 |
All versions, plus listed versions 0.13-50.15-10.19-1 |
None known |
libnet-cidr-set-perlUbuntu:26.10 |
All versions, plus listed versions 0.19-10.20-10.21-10.22-10.23-1 |
None known |
libnet-cidr-set-perlUbuntu:26.04:LTS |
All versions, plus listed versions 0.19-1 |
None known |
perl-Net-CIDR-SetopenSUSE:Tumbleweed From an advisory covering 2 CVEs |
before 0.210.0-1.1 | 0.210.0-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-49940 is a medium vulnerability (CVSS 6.5) in Rrwo Net::cidr::set, published June 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. Fixed in libnet-cidr-set-perl 0.15-1+deb13u1.
References
metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes
nvd.nist.gov/vuln/detail/CVE-2025-40911
github.com/advisories/GHSA-hpv8-77xm-27wx
cpan.org/modules
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security-tracker.debian.org/tracker/CVE-2026-49940
ubuntu.com/security/CVE-2026-49940
cve.org/CVERecord?id=CVE-2026-49940
suse.com/security/cve/CVE-2026-49940