CVE-2026-33599 | THREATINT

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.

PUBLISHED Reserved 2026-03-23 | Published 2026-04-22 | Updated 2026-04-22 | Assigner OX

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

Problem types

Out-of-bounds Read

Product status

Default status

unaffected

1.9.0 (semver) before 1.9.13

affected

2.0.0 (semver) before 2.0.4

affected

Credits

ylwango613 finder

References

www.dnsdist.org/...owerdns-advisory-for-dnsdist-2026-04.html

cve.org (CVE-2026-33599)

nvd.nist.gov (CVE-2026-33599)

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