What is CVE-2026-4748?

CVE-2026-4748 is a high-severity vulnerability in Freebsd, classified under CWE-480. CVSS score: 7.5/10. Published 2026-04-01.

How severe is CVE-2026-4748?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Freebsd

CVE-2026-4748

A regression in the way hashes were calculated caused rules containing the address range syntax (x.x.x.x - y.y.y.y) that only differ in the address range(s) involved to be silently dropped as duplicates. Only the first of such rules is ac…

EPSS: 0.003 (16.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Freebsd — versions 14.3, 15.0, 14.4-RELEASE

Weakness classification (CWE)

CWE-480
CWE-754 — Improper Check for Unusual or Exceptional Conditions
CWE-1023

References

secteam@freebsd.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-4748?: CVE-2026-4748 is a high-severity vulnerability in Freebsd, classified under CWE-480. CVSS score: 7.5/10. Published 2026-04-01.
How severe is CVE-2026-4748?: High severity. CVSS v3 base score is 7.5 out of 10.