CVE-2026-33599

—

CVSS 3.1

8.1 high

EPSS

<1%p21

Published

Apr 22, 2026 (Apr 22, 2026)

Modified

Jun 17, 2026

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.

Vendors: powerdns
Products: dnsdist
Weakness: CWE-125
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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