CVE-2026-45190 STIGTSP CVE debrief

Who should care

Users of Net::CIDR::Lite versions before 0.24 for Perl should be aware of this vulnerability and take steps to mitigate it. This may involve updating to version 0.24 or later, or implementing compensating controls to prevent IP ACL bypass. Operators, platform administrators, and security teams may be impacted.

Technical summary

The vulnerability in Net::CIDR::Lite is caused by improper validation of IP address and CIDR mask inputs. Specifically, inputs containing a trailing newline or non-ASCII digit characters are not properly handled, which can cause the parser to re-encode them to a different address than the input string spelled. This can lead to incorrect results from find() and bin_find(). Affected users should review their deployments and consider updating to version 0.24 or later.

Defensive priority

Medium

Recommended defensive actions

• Update Net::CIDR::Lite to version 0.24 or later
• Implement compensating controls to prevent IP ACL bypass
• Monitor for suspicious activity
• Perform inventory checks to identify affected systems
• Review relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-05-10T21:16:29.273Z and was last modified on 2026-07-24T13:10:00.223Z. The NVD entry is currently Deferred. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Evidence is limited to CVE and NVD information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.