CVE-2026-33254 | PowerDNS DNSdist up to 1.9.12/2.0.3 denial of service

VDB-358954 · CVE-2026-33254 · GCVE-0-2026-33254 POWERDNS DNSDIST UP TO 1.9.12/2.0.3 DENIAL OF SERVICE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 0.25+ Summaryinfo A vulnerability categorized as problematic has been discovered in PowerDNS DNSdist up to 1.9.12/2.0.3. This affects an unknown part. Executing a manipulation can lead to denial of service. The identification of this vulnerability is CVE-2026-33254. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in PowerDNS DNSdist up to 1.9.12/2.0.3. It has been declared as problematic. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes: An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default. The advisory is available at dnsdist.org. This vulnerability was named CVE-2026-33254 since 03/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 1.9.13 or 2.0.4 eliminates this vulnerability. Productinfo Type Domain Name Software Vendor PowerDNS Name DNSdist Version 1.9.0 1.9.1 1.9.2 1.9.3 1.9.4 1.9.5 1.9.6 1.9.7 1.9.8 1.9.9 1.9.10 1.9.11 1.9.12 2.0.0 2.0.1 2.0.2 2.0.3 License open-source 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: Denial of service CWE: 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: DNSdist 1.9.13/2.0.4 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: dnsdist.org Status: Confirmed CVE: CVE-2026-33254 (🔒) GCVE (CVE): GCVE-0-2026-33254 GCVE (VulDB): GCVE-100-358954 Entryinfo Created: 04/22/2026 17:26 Changes: 04/22/2026 17:26 (63) Complete: 🔍 Cache ID: 99:567:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸