CVE-2026-33599
8.1
HIGH
CVSS 3.1
EPSS 0.00%
Description
A rogue backend can send a crafted SVCB response to a Discovery of Designated Resolvers request, when requested via either the autoUpgrade (Lua) option to newServer or auto_upgrade (YAML) settings. DDR upgrade is not enabled by default.
How to fix CVE-2026-33599
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/dnsdist—no fix listed
Is CVE-2026-33599 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |