CVE-2026-13321CWE-346

CVE-2026-13321

High · published July 22, 2026

CVSS v3.1
8.6
EPSS
0%
Percentile
10.2
In the wild
Unconfirmed
What it is

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone.

This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00207 · 10.2th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-07-22T19:16Z
References (3)
https://downloads.isc.org/isc/bind9/9.20.26 · [email protected]https://downloads.isc.org/isc/bind9/9.21.24 · [email protected]https://kb.isc.org/docs/cve-2026-13321 · [email protected]
EPSS history
Timeline
  • 22 JUL 14:16Z
    DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field
    cvelistv5