CVE-2026-19941
published 2026-09-16CVE-2026-19941: An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream…
PriorityP433medium5.9CVSS 3.1
AVNACHPRNUINSUCNIHAN
EPSS
0.23%
12.4th percentile
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| isc | bind | — | — |
| isc | bind_9 | 9.11.0 – 9.18.50 | — |
| isc | bind_9 | 9.11.3-S1 – 9.18.50-S1 | — |
| isc | bind_9 | 9.20.0 – 9.20.27 | — |
| isc | bind_9 | 9.20.9-S1 – 9.20.27-S1 | — |
| isc | bind_9 | 9.21.0 – 9.21.25 | — |
| openshift | ose-rhel-coreos-8 | — | — |
| openshift | ose-rhel-coreos-9 | — | — |
| ubuntu | bind9 | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
vendor_ubuntu8.6HIGH
vendor_redhat5.9MEDIUM
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GHSA
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existenc
ghsa_unreviewed·2026-09-16
CVE-2026-19941 [MEDIUM] CWE-345 An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existenc
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
Ubuntu
Bind vulnerabilities
vendor_ubuntu·2026-10-14·CVSS 8.6
CVE-2026-19033 [HIGH] Bind vulnerabilities
Title: Bind vulnerabilities
Summary: Several security issues were fixed in Bind.
Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain
malformed DNSKEY records. A remote attacker could possibly use this issue
to cause Bind to consume resources, resulting in a denial of service. This
issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04
LTS. (CVE-2025-8677)
Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind
incorrectly accepted certain records from answers. A remote attacker could
possibly use this issue to perform a cache poisoning attack. This issue
only affected Ubuntu 18.04 LTS. (CVE-2025-40778)
Samy Medjahed discovered that Bind incorrectly handled insecure delegation
validation. A remote attacker could possibly use this iss
Red Hat
bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
vendor_redhat·2026-09-16·CVSS 5.9
CVE-2026-19941 [MEDIUM] CWE-346 bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
A flaw was found in BIND 9. A remote attacker could exploit this by providing an inapplicable NSEC (Next Secure) record to a `named` resolver. This could allow the attacker to mask the existence of a victim's wildcard DNS (Domain Name System) record, potentially leading to a misrepre
No detection rules found.
No public exploits indexed.
Hackernews
BIND 9 Update Fixes 14 Flaws, Including an Unauthenticated Crash Over DNS-over-HTTPS
blogs_hackernews·2026-09-17·CVSS 5.9
CVE-2026-19662 [MEDIUM] BIND 9 Update Fixes 14 Flaws, Including an Unauthenticated Crash Over DNS-over-HTTPS
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## BIND 9 Update Fixes 14 Flaws, Including an Unauthenticated Crash Over DNS-over-HTTPS
The Internet Systems Consortium (ISC) has released BIND 9.20.29 and 9.21.26 to fix fourteen security flaws it disclosed on 16 September in BIND 9, its open-source DNS server software. One of them affects any BIND server that answers DNS-over-HTTPS (DoH).
A sender with no credentials can crash the server process, named, with a single request that carries an invalid SIG(0) signature, if the sender closes the connection before named finishes checking the signature.
ISC said in its advisories that it is not aware of any of the fourteen being ex
Bugzilla
CVE-2026-19941 bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records [fedora-all]
bugzilla·2026-09-17·CVSS 5.9
CVE-2026-19941 [MEDIUM] CVE-2026-19941 bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records [fedora-all]
CVE-2026-19941 bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
Bugzilla
CVE-2026-19941 bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
bugzilla·2026-09-16·CVSS 5.9
CVE-2026-19941 [MEDIUM] CVE-2026-19941 bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
CVE-2026-19941 bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
2026-09-16
Published