Loading vulnerability…
CVE-2026-78301 is an improper validation vulnerability in BIND 9 named. A malformed authoritative zone containing an NS or DNAME node above the configured zone origin can cause named to incorrectly treat that node as a zone cut. Queries below the configured origin can consequently lose authoritative status and receive an out-of-zone delegation. In deployments where the same named instance is authoritative and recursive, named can follow this locally sourced delegation and cache attacker-supplied DNS data for names outside the configured zone. The malformed state remains effective until the affected zone is removed or corrected in the zone database. Affected versions are BIND 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and corresponding affected Supported Preview Edition releases.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A BIND 9 authoritative DNS-server flaw in which a malformed zone containing an NS or DNAME node above the zone origin is treated as a zone cut. An attacker able to introduce such a zone, including through zone transfer, can cause out-of-zone delegation responses; on recursive BIND servers this can result in caching attacker-supplied DNS data for names outside the configured zone.
A medium-severity remotely exploitable BIND 9 flaw in which malformed zone data containing an out-of-zone NS or DNAME node is treated as an authoritative zone cut. An attacker able to insert such a zone, for example through a zone transfer, can cause bogus out-of-zone delegations; on combined authoritative and recursive servers, this can enable cache poisoning with attacker-supplied records.
A network-accessible vulnerability tracked as CVE-2026-78301 affecting Debian Linux versions 12.0, 13.0, and 14.0. The supplied CVSS v3 vector indicates high attack complexity, high privileges required, scope changed, high integrity impact, and no confidentiality or availability impact.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.