HIGH

CVE-2026-13321

CVSS v3

8.6

HIGH

EPSS Score

0.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

bindAlmaLinux:10all versions · fixed in 32:9.18.33-15.el10_2.10and 7 other packages
bindAlmaLinux:9all versions · fixed in 32:9.16.23-40.el9_8.8and 9 other packages
bindAlmaLinux:8all versions · fixed in 32:9.11.36-16.el8_10.14and 16 other packages
bind9.16AlmaLinux:8all versions · fixed in 32:9.16.23-0.22.el8_10.12and 8 other packages
bind9.18AlmaLinux:9all versions · fixed in 32:9.18.29-14.el9_8.8and 6 other packages

Vendor advisories

CVE-2026-13321 Red Hat Product Security595 products fixed · 8 known affected
bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field
bind as a component of Red Hat Enterprise Linux 6 · bind-chroot as a component of Red Hat Enterprise Linux 6 · bind-devel as a component of Red Hat Enterprise Linux 6
RHSA-2026:80501 Red Hat Product Security6 products fixed
Red Hat Security Advisory: bind9.16 security, bug fix, and enhancement update
RHSA-2026:79160 Red Hat Product Security8 products fixed
Red Hat Security Advisory: bind9.16 security, bug fix, and enhancement update
RHSA-2026:70615 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.18.56 bug fix and security update
RHSA-2026:70586 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.17.58 bug fix and security update
RHSA-2026:65851 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.18.55 bug fix and security update

11 more advisories

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Published: 2026-07-22
Last Modified: 2026-07-22

Frequently asked questions

What is CVE-2026-13321?

Is CVE-2026-13321 actively exploited?

Active exploitation of CVE-2026-13321 has not been confirmed. Its EPSS score was 0.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-13321?

CVE-2026-13321 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.

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