CVE-2026-78301
published 2026-09-16CVE-2026-78301: A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND…
PriorityP431medium5.8CVSS 3.1
AVNACHPRHUINSCCNIHAN
EPSS
0.21%
10.1th percentile
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database.
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
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
vendor_ubuntu8.6HIGH
vendor_redhat5.8MEDIUM
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VulDB
ISC BIND up to 9.21.25 Recursion recursion (Nessus ID 347969)
vuldb·2026-09-18·CVSS 5.8
CVE-2026-78301 [MEDIUM] ISC BIND up to 9.21.25 Recursion recursion (Nessus ID 347969)
A vulnerability classified as problematic has been found in ISC BIND up to 9.18.50/9.18.50-S1/9.20.27/9.20.27-S1/9.21.25. Affected is an unknown function of the component Recursion. This manipulation causes uncontrolled recursion.
This vulnerability appears as CVE-2026-78301. The attack may be initiated remotely. There is no available exploit.
GHSA
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut.
ghsa_unreviewed·2026-09-16
CVE-2026-78301 [MEDIUM] CWE-349 A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut.
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database.
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
bind: BIND: DNS cache poisoning via malformed zone insertion
vendor_redhat·2026-09-16·CVSS 5.8
CVE-2026-78301 [MEDIUM] CWE-168 bind: BIND: DNS cache poisoning via malformed zone insertion
bind: BIND: DNS cache poisoning via malformed zone insertion
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database.
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 fl
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion [fedora-all]
bugzilla·2026-09-17·CVSS 5.8
CVE-2026-78301 [MEDIUM] CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion [fedora-all]
CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion [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.
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This si
Bugzilla
CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion
bugzilla·2026-09-16·CVSS 5.8
CVE-2026-78301 [MEDIUM] CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion
CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion
A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database.
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.
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
2026-09-16
Published