CVE-2026-10723

Incorrect acceptance of NSEC3 records

State: Published
Severity: 6.8 Medium
Published: Jul 22, 2026
Updated: Jul 22, 2026
Reserved: Jun 3, 2026

Description

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 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.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N	isc

Weaknesses

CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
BIND 9ISC	9.18.0 through 9.18.50Affected 9.20.0 through 9.20.24Affected 9.21.0 through 9.21.23Affected 9.11.3-S1 through 9.18.50-S1Affected 9.20.9-S1 through 9.20.24-S1Affected

References

CVE-2026-10723vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.26patch
https://downloads.isc.org/isc/bind9/9.21.24patch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.