CVE-2026-33599

Summary

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.

Affected Software

VendorProductVersion RangeStatus
PowerDNSDNSdist1.9.0 < 1.9.13affected
PowerDNSDNSdist2.0.0 < 2.0.4affected

Weaknesses

  • Out-of-bounds Read

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References