CVE-2026-33254

Resource exhaustion via DoQ/DoH3 connections

Medium · published April 22, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
56.2
In the wild
Unconfirmed
What it is

An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00801 · 56.2th percentile
Published
2026-04-22T13:45Z
EPSS history
Timeline
  • 22 APR 13:45Z
    Resource exhaustion via DoQ/DoH3 connections
    cvelistv5