CVE-2026-33258 | PowerDNS Recursor up to 5.2.8/5.3.5/5.4.0 Zone allocation of resources

VDB-358842 · CVE-2026-33258 · GCVE-0-2026-33258 POWERDNS RECURSOR UP TO 5.2.8/5.3.5/5.4.0 ZONE ALLOCATION OF RESOURCES HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 1.50+ 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. Productinfo Type Domain Name Software Vendor PowerDNS Name Recursor Version 5.0 5.1 5.2 5.2.0 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.6 5.2.7 5.2.8 5.3 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.4.0 License free 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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 04/22/2026 +0 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 Entryinfo Created: 04/22/2026 13:29 Changes: 04/22/2026 13:29 (64) Complete: 🔍 Cache ID: 99:14C:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸