PT-2026-34439 · Powerdns · Dnsdist

Mehtab Zafar · Published 2026-04-22 · Updated 2026-04-22 · CVE-2026-33595

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

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

Name of the Vulnerable Software and Affected Versions The product name cannot be determined (affected versions not specified)

Description A client can trigger excessive memory allocation by generating numerous error responses over a single DoQ (DNS over QUIC) and DoH3 (DNS over HTTP/3) connection, because certain resources are not properly released until the connection is terminated.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-33595

Affected Products

Dnsdist

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33595 · Security Note
• https://twitter.com/CVEnew/status/2047012131657470126 · Twitter Post
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html · Note
• https://twitter.com/VulmonFeeds/status/2047014745874587884 · Twitter Post