CVE-2026-33599

Out-of-bounds read in service discovery

Low · published April 22, 2026

CVSS v3.1
3.1
EPSS
1%
Percentile
56.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00801 · 56.2th percentile
Published
2026-04-22T13:46Z
EPSS history
Timeline
  • 22 APR 13:46Z
    Out-of-bounds read in service discovery
    cvelistv5