CVE-2026-33599: A rogue backend can send a crafted SVCB response to a Discovery of Designated Resolvers request, when requested via…
CVE-2026-33599 · Severity: low · CVSS 3.1 · Published 2026-04-22
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-33599 being exploited in the wild.
How severe is CVE-2026-33599?
Low severity, with a CVSS score of 3.1, published 22 April 2026.
Which products and versions are affected?
Powerdns Dnsdist. The advisory does not name versions.
Is there a fix for CVE-2026-33599?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-33599?
Check whether you run Powerdns Dnsdist. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.