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CVE-2026-33599

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CVE-2026-33599

Published: Apr 22, 2026

Modified: Apr 22, 2026

PUBLISHED

CVSS v3.1

3.1

LOW

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.

VendorProductVersions

PowerDNS

DNSdist

affected
1.9.0 - < 1.9.13
affected
2.0.0 - < 2.0.4

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

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