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CVE-2026-33256 Details

Description

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html	[email protected]	Broken LinkVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	CISA-ADP

Affected Products

Product	Versions
powerdns recursor	>= 5.2.0, < 5.2.9 >= 5.3.0, < 5.3.6 5.4.0
CPE cpe:2.3:a:powerdns:recursor:::::::: cpe:2.3:a:powerdns:recursor:5.4.0:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 27, 2026	Initial Analysis	[email protected]
Apr 22, 2026	CVE Modified	CISA-ADP
Apr 22, 2026	New CVE Received	[email protected]