Executive brief
PowerDNS Authoritative Server is a widely used system for managing domain name records. A vulnerability exists where an authorized administrator using the management interface can input specific types of malformed data. This can lead to the corruption of the underlying database, potentially causing service outages or loss of DNS record integrity.
Technical details
The vulnerability is classified as an integer overflow (CWE-190) occurring during the processing of HTTPS or SVCB records via the REST API. When the LMDB storage backend is in use, the injection of specifically crafted invalid record data triggers a corruption of the database. This requires high privileges (operator access to the REST API) but can result in a complete loss of integrity and availability for the affected database. The issue is addressed in PowerDNS Authoritative versions 4.9.14 and 5.0.4.
Affected products
- PowerDNS Authoritative Server 4.9.0 to 4.9.13, 5.0.0 to 5.0.3
Timeline
- 2026-04-22: disclosed
- 2026-04-22: advisory