CVE-2026-33596

Published: Apr 22, 2026Modified: Jun 17, 2026

6.5

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 2.8 / Impact: 3.6

Source: NVD

Description

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.

Affected (2)

Products: Powerdns: Dnsdist

Powerdns

1 product

Dnsdist

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Powerdns Dnsdist	From 1.9.0 to 1.9.13
Powerdns Dnsdist	From 2.0.0 to 2.0.4

Related CWEs

CWE-190

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (1)

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

Source: security@open-xchange.com

Vendor Advisory

Timeline

No history available yet.