CVE-2026-33594

Outgoing DoH excessive memory allocation

Medium · published April 22, 2026

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

A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.

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
2026-04-22T13:48Z
EPSS history
Timeline
  • 22 APR 13:48Z
    Outgoing DoH excessive memory allocation
    cvelistv5