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

CVE-2026-33599

Out-of-bounds read in service discovery PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
PowerDNS / DNSdist	affected 1.9.0 before 1.9.13; affected 2.0.0 before 2.0.4

CWE

No CWE identifiers supplied.

References

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.