Insufficient verification of data authenticity in ISC BIND - CVE-2026-77119

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Main Vulnerability Database Vulnerabilities #VU150229

Insufficient verification of data authenticity in ISC BIND - CVE-2026-77119

Published: September 16, 2026


Vulnerability identifier: #VU150229
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-77119
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause DNS cache poisoning.

The vulnerability exists due to insufficient verification of data authenticity in BIND 9 NSEC3 insecure-referral proof validation when processing insecure-referral proofs. A remote attacker can provide a validly signed NSEC3 record from an unrelated sibling zone to cause DNS cache poisoning.


Affected software

ISC BIND
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
Debian Linux
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
Ubuntu
Basesystem Module
Server Applications Module
openSUSE Leap
Anolis OS
openEuler
Fedora
bind9 (Ubuntu package)
python3-bind
bind-doc
bind-debugsource
bind-debuginfo
bind
bind-utils-debuginfo
bind-utils
bind-license
bind-dnssec-utils
bind-devel
bind-chroot
bind-libs
bind-dnssec-doc
bind9-next
bind-dyndb-ldap
bind9 (Debian package)

How to mitigate CVE-2026-77119

Install security update from vendor's website.

ISC BIND - addressed in versions 9.20.29, 9.20.29-s1, 9.21.26
bind9 (Ubuntu package) - addressed in versions 1:9.9.5.dfsg-3ubuntu0.19+esm15, 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11, 1:9.11.3+dfsg-1ubuntu1.19+esm6, 1:9.18.30-0ubuntu0.20.04.2+esm3, 1:9.18.39-0ubuntu0.22.04.7, 1:9.18.39-0ubuntu0.24.04.8, 1:9.20.24-1ubuntu0.4
python3-bind - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1
bind-doc - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind-debugsource - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind-debuginfo - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind-utils-debuginfo - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind-utils - addressed in versions 9.16.50-150400.5.70.1, 9.16.50-150500.8.46.1, 9.20.29-150700.3.32.2
bind-license - addressed in versions 9.18.21-15, 9.20.21-7
bind-dnssec-utils - addressed in versions 9.18.21-15, 9.20.21-7
bind-devel - addressed in versions 9.18.21-15, 9.20.21-7
bind-debugsource - addressed in versions 9.18.21-15, 9.20.21-7
bind-debuginfo - addressed in versions 9.18.21-15, 9.20.21-7
bind-chroot - addressed in versions 9.18.21-15, 9.20.21-7
bind - addressed in versions 9.18.21-15, 9.20.21-7
bind-libs - addressed in versions 9.18.21-15, 9.20.21-7
bind-utils - addressed in versions 9.18.21-15, 9.20.21-7
bind-dnssec-doc - addressed in versions 9.18.21-15, 9.20.21-7
bind - addressed in versions 9.18.51^git20261003.d0a87358-2.fc43, 9.18.51^git20261003.d0a87358-2.fc44, 9.18.51^git20261003.d0a87358-11.fc46
bind-license - update to 9.20.29-1
bind-chroot - update to 9.20.29-1
bind - update to 9.20.29-1
bind-doc - update to 9.20.29-1
bind-dnssec-doc - update to 9.20.29-1
bind-utils - update to 9.20.29-1
bind-dnssec-utils - update to 9.20.29-1
bind-libs - update to 9.20.29-1
bind-devel - update to 9.20.29-1
bind9-next - addressed in versions 9.21.26-1.fc43, 9.21.26-1.fc44, 9.21.26-1.fc45
bind-dyndb-ldap - addressed in versions 11.11-15.fc43, 11.11-17.fc44, 11.11-18.fc46
bind9 (Debian package) - update to 1:9.20.29-1~deb13u1

External References

Related Security Bulletins