CVE-2026-33599
low-risk
Published 2026-04-22
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.
Do I need to act?
-
0.01% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.1/10
Low
ADJACENT_NETWORK
/ HIGH complexity
Affected Products (1)
Affected Vendors
References (1)
13
/ 100
low-risk
Severity
8/34 · Low
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal