CVE-2026-78301: Out-of-zone database nodes can become authoritative zone cuts
ISC · BIND 9
Vendor fix available · Affected: ISC BIND 9 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 10% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- ISC · BIND 9from 9.11.0 up to and including 9.18.50; from 9.20.0 up to and including 9.20.27; from 9.21.0 up to and including 9.21.25; from 9.11.3-S1 up to and including 9.18.50-S1; from 9.20.9-S1 up to and including 9.20.27-S1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- ISC
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-78301 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.