PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0 Zone allocation of resources

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0. Affected by this vulnerability is an unknown functionality of the component Zone Handler. The manipulation results in allocation of resources. This vulnerability is reported as CVE-2026-33258. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0. Affected is an unknown functionality of the component Zone Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.

The weakness was disclosed by Haruto Kimura. The advisory is available at docs.powerdns.com. This vulnerability is traded as CVE-2026-33258 since 03/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 5.2.9, 5.3.6 or 5.4.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1225). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • SUSE openSUSE
  • Open Source PowerDNS

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Recursor 5.2.9/5.3.6/5.4.1

Timelineinfo

03/18/2026 CVE reserved
04/22/2026 +34 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
05/03/2026 +11 days VulDB entry last update

Sourcesinfo

Advisory: docs.powerdns.com
Researcher: Haruto Kimura
Status: Confirmed

CVE: CVE-2026-33258 (🔒)
GCVE (CVE): GCVE-0-2026-33258
GCVE (VulDB): GCVE-100-358842
CERT Bund: WID-SEC-2026-1225 - PowerDNS: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 13:29
Updated: 05/03/2026 20:14
Changes: 04/22/2026 13:29 (64), 05/03/2026 20:14 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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