CVE-2026-45191

Summary

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.

Affected Software

Weaknesses

• CWE-1289: CWE-1289 Improper Validation of Unsafe Equivalence in Input

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

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

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