CVE-2026-45190

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-05-10. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass.

Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result.

Example:

my $cidr = Net::CIDR::Lite->new(); $cidr->add("::1\n/128"); $cidr->find("::1a"); # incorrectly returns true

See also CVE-2026-45191.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

May 10, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic
https://www.cve.org/CVERecord?id=CVE-2026-45191
generic

Changes - metacpan.org

https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes
generic
https://github.com/stigtsp/Net-CIDR-Lite/commit/ca9542adec87110556601d7ce48381ea8d13e692.patch

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibnet-cidr-lite-perl (0.21-1ubuntu0.16.04.1~esm2) @ xenial2026-08-23ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
perl-net-cidr-lite—0.24-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libnet-cidr-lite-perl0.22-1 ... 0.24-1 (9 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libnet-cidr-lite-perl0.22-2, 0.22-3~deb12u10.22-3~deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libnet-cidr-lite-perl0.22-2, 0.22-3~deb12u1, 0.22-3~deb12u2, 0.22-3~deb13u10.22-3~deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libnet-cidr-lite-perl0.22-2 ... 0.23-1 (7 versions)0.24-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 203 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-12 15:01 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 12:23 UTCOSV refresh
  9. 2026-09-11 09:37 UTCEPSS rescore
  10. 2026-09-10 09:34 UTCEPSS rescore
  11. 2026-09-08 22:00 UTCEPSS rescore
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-26 14:46 UTCEPSS rescore
  22. 2026-08-25 13:49 UTCEPSS rescore
  23. 2026-08-23 18:44 UTCEG score recompute
  24. 2026-08-23 18:44 UTCVendor advisory
  25. 2026-08-23 18:44 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 11:19 UTCEG score recompute
  8. 2026-08-17 11:19 UTCVendor advisory
  9. 2026-08-17 11:19 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 04:28 UTCEG score recompute
  12. 2026-08-16 04:28 UTCVendor advisory
  13. 2026-08-16 04:28 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 01:58 UTCEG score recompute
  16. 2026-08-15 01:58 UTCVendor advisory
  17. 2026-08-15 01:58 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 03:02 UTCEG score recompute
  20. 2026-08-14 03:02 UTCVendor advisory
  21. 2026-08-14 03:02 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-12 23:03 UTCEG score recompute
  24. 2026-08-12 23:03 UTCVendor advisory
  25. 2026-08-12 23:03 UTCGHSA enrichment
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-12 00:08 UTCEG score recompute
  28. 2026-08-12 00:08 UTCVendor advisory
  29. 2026-08-12 00:08 UTCGHSA enrichment
  30. 2026-08-11 01:12 UTCEG score recompute
  31. 2026-08-11 01:12 UTCVendor advisory
  32. 2026-08-11 01:12 UTCGHSA enrichment
  33. 2026-08-11 00:00 UTCEPSS rescore
  34. 2026-08-10 01:13 UTCEG score recompute
  35. 2026-08-10 01:13 UTCVendor advisory
  36. 2026-08-10 01:13 UTCGHSA enrichment
  37. 2026-08-09 13:46 UTCEPSS rescore
  38. 2026-08-09 02:18 UTCVendor advisory
  39. 2026-08-09 02:18 UTCGHSA enrichment
  40. 2026-08-07 19:52 UTCEG score recompute
  41. 2026-08-07 19:52 UTCVendor advisory
  42. 2026-08-07 19:52 UTCGHSA enrichment
  43. 2026-08-06 20:56 UTCEG score recompute
  44. 2026-08-06 20:56 UTCVendor advisory
  45. 2026-08-06 20:56 UTCGHSA enrichment
  46. 2026-08-06 13:47 UTCEPSS rescore
  47. 2026-08-05 22:01 UTCEG score recompute
  48. 2026-08-05 22:01 UTCVendor advisory
  49. 2026-08-05 22:00 UTCGHSA enrichment
  50. 2026-08-05 19:17 UTCEPSS rescore
  51. 2026-08-04 15:10 UTCEPSS rescore
  52. 2026-08-04 10:38 UTCEPSS rescore
  53. 2026-08-04 00:12 UTCEG score recompute
  54. 2026-08-04 00:12 UTCVendor advisory
  55. 2026-08-04 00:12 UTCGHSA enrichment
  56. 2026-08-03 10:36 UTCEPSS rescore
  57. 2026-08-03 01:16 UTCVendor advisory
  58. 2026-08-03 01:16 UTCGHSA enrichment
  59. 2026-08-02 02:20 UTCEG score recompute
  60. 2026-08-02 02:20 UTCVendor advisory
  61. 2026-08-02 02:20 UTCGHSA enrichment
  62. 2026-08-01 04:16 UTCEPSS rescore
  63. 2026-07-30 16:28 UTCEPSS rescore
  64. 2026-07-30 01:30 UTCEPSS rescore
  65. 2026-07-28 15:36 UTCEPSS rescore
  66. 2026-07-27 14:13 UTCEPSS rescore
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-26 08:23 UTCEG score recompute
  70. 2026-07-26 08:23 UTCVendor advisory
  71. 2026-07-26 08:23 UTCGHSA enrichment
  72. 2026-07-25 14:18 UTCEPSS rescore
  73. 2026-07-24 14:17 UTCEPSS rescore
  74. 2026-07-23 14:18 UTCEPSS rescore
  75. 2026-07-23 03:16 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-45190?
CVE-2026-45190 is a medium vulnerability published on May 10, 2026. Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass. Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input…
When was CVE-2026-45190 disclosed?
CVE-2026-45190 was first published in the National Vulnerability Database on May 10, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45190 actively exploited?
CVE-2026-45190 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.8% of all scored CVEs.
What is the CVSS score of CVE-2026-45190?
CVE-2026-45190 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-45190?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45190, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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