PT-2026-34443 · Powerdns · Powerdns Recursor

Ylwango613 · Published 2026-04-22 · Updated 2026-04-28 · CVE-2026-33599

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions PowerDNS Recursor (affected versions not specified)

Description A rogue backend can send a crafted SVCB response to a Discovery of Designated Resolvers request. This occurs when the request is made via the autoUpgrade (Lua) option to newServer or the auto upgrade (YAML) settings. Discovery of Designated Resolvers (DDR) is a mechanism used by DNS clients to discover and upgrade to more secure resolver configurations.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-33599

OPENSUSE-SU-2026:10632-1

Affected Products

Powerdns Recursor

References · 22

• https://cve.org/CVERecord?id=CVE-2026-33599 · Security Note
• https://ubuntu.com/security/CVE-2026-33599 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33599 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10632-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-33599 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33599 · Security Note
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33599 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-33593 · Note
• https://suse.com/security/cve/CVE-2026-33598 · Note
• https://suse.com/security/cve/CVE-2026-33260 · Note
• https://suse.com/security/cve/CVE-2026-33595 · Note
• https://twitter.com/VulmonFeeds/status/2046994268682621101 · Twitter Post
• https://twitter.com/CVEnew/status/2047012135864332643 · Twitter Post
• https://suse.com/security/cve/CVE-2026-33602 · Note