CVE-2026-33599 LOW

CVE-2026-33599: Out-of-bounds read in service discovery

Vendor Powerdns
Product DNSdist
Published April 22, 2026
Last update April 22, 2026
View on NVD All CVEs

CVSS base score

3.1/10
Attack vector Adjacent
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
April 22, 2026 Record updated