CVE-2026-33595 | PowerDNS DNSdist up to 1.9.12/2.0.3 memory allocation

VDB-358955 · CVE-2026-33595 · GCVE-0-2026-33595 POWERDNS DNSDIST UP TO 1.9.12/2.0.3 MEMORY ALLOCATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 0.25+ Summaryinfo A vulnerability identified as problematic has been detected in PowerDNS DNSdist up to 1.9.12/2.0.3. This vulnerability affects unknown code. The manipulation leads to memory allocation. This vulnerability is referenced as CVE-2026-33595. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability was found in PowerDNS DNSdist up to 1.9.12/2.0.3. It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is availability. The summary by CVE is: A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection. The weakness was published by Mehtab Zafar. It is possible to read the advisory at dnsdist.org. The identification of this vulnerability is CVE-2026-33595 since 03/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. 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: Memory allocation CWE: CWE-789 / 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: DNSdist 1.9.13/2.0.4 Timelineinfo 03/23/2026 CVE reserved 04/22/2026 +29 days Advisory disclosed 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Advisory: dnsdist.org Researcher: Mehtab Zafar Status: Confirmed CVE: CVE-2026-33595 (🔒) GCVE (CVE): GCVE-0-2026-33595 GCVE (VulDB): GCVE-100-358955 Entryinfo Created: 04/22/2026 17:27 Changes: 04/22/2026 17:27 (64) Complete: 🔍 Cache ID: 99:B28:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸