CVE-2026-19668CWE-407

CVE-2026-19668

Medium · published September 16, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a particular kind of invalid DNSSEC record. Default limits on "max-records-per-type" and "max-types-per-name" help mitigate the exposure.

This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00480 · 40.4th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-09-16T19:17Z
References (3)
https://downloads.isc.org/isc/bind9/9.20.29 · [email protected]https://downloads.isc.org/isc/bind9/9.21.26 · [email protected]https://kb.isc.org/docs/cve-2026-19668 · [email protected]
EPSS history
Timeline
  • 18 SEP 03:58Z
    EPSS moved — → 0%
    epss
  • 16 SEP 14:12Z
    Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching
    cvelistv5