CVE-2026-33596

TCP backend stream ID overflow

Low · published April 22, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.

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
0.00390 · 31.9th percentile
Published
2026-04-22T13:47Z
EPSS history
Timeline
  • 22 APR 13:47Z
    TCP backend stream ID overflow
    cvelistv5