Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass.

Mask forms like "/00" and "/01" pass validation and parse to the same prefix as their unpadded value.

See also CVE-2026-45190.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00033.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
STIGTSP Net::CIDR::Lite unaffected
Version Status Constraints
0 affected < 0.24

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

Upgrade to version 0.24 or newer, or apply the patch provided.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/stigtsp/Net-CIDR-Lite/commit/24e2c439ec405e5256024b9acefd4f7008c5ed0c.patch cve-icon cve-icon
https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-45190 cve-icon cve-icon
History

Mon, 11 May 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 10 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Stigtsp
Stigtsp net::cidr::lite
Vendors & Products Stigtsp
Stigtsp net::cidr::lite

Sun, 10 May 2026 20:30:00 +0000

Type Values Removed Values Added
Description Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass. Mask forms like "/00" and "/01" pass validation and parse to the same prefix as their unpadded value. See also CVE-2026-45190.
Title Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass
Weaknesses CWE-1289
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-05-11T16:37:48.124Z

Reserved: 2026-05-10T16:36:05.708Z

Link: CVE-2026-45191

cve-icon Vulnrichment

Updated: 2026-05-11T16:37:33.165Z

cve-icon NVD

Status : Received

Published: 2026-05-10T21:16:29.380

Modified: 2026-05-11T18:16:41.120

Link: CVE-2026-45191

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T19:45:08Z

Weaknesses