CVE-2026-33611: Integer Overflow or Wraparound in PowerDNS Authoritative
An operator allowed to use the REST API can cause the Authoritative server to produce invalid HTTPS or SVCB record data, which can in turn cause LMDB database corruption, if using the LMDB backend.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound condition triggered by an operator using the REST API to create invalid HTTPS or SVCB DNS records in PowerDNS Authoritative server. When the LMDB backend is used, this can cause database corruption. The affected versions are 4.9.0 and 5.0.0. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and high availability impact. No patch or official remediation level has been published as of the data available.
Potential Impact
Successful exploitation can cause integrity and availability impacts by corrupting the LMDB database used by PowerDNS Authoritative server. This may disrupt DNS service reliability and correctness. There is no confidentiality impact reported. The attack requires high privileges (operator access to REST API), limiting the threat to authorized users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict REST API access to trusted operators only and monitor for unusual DNS record configurations that could trigger this issue. Avoid using the LMDB backend if possible or implement additional validation on DNS record data submitted via the REST API.
CVE-2026-33611: Integer Overflow or Wraparound in PowerDNS Authoritative
Description
An operator allowed to use the REST API can cause the Authoritative server to produce invalid HTTPS or SVCB record data, which can in turn cause LMDB database corruption, if using the LMDB backend.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound condition triggered by an operator using the REST API to create invalid HTTPS or SVCB DNS records in PowerDNS Authoritative server. When the LMDB backend is used, this can cause database corruption. The affected versions are 4.9.0 and 5.0.0. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and high availability impact. No patch or official remediation level has been published as of the data available.
Potential Impact
Successful exploitation can cause integrity and availability impacts by corrupting the LMDB database used by PowerDNS Authoritative server. This may disrupt DNS service reliability and correctness. There is no confidentiality impact reported. The attack requires high privileges (operator access to REST API), limiting the threat to authorized users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict REST API access to trusted operators only and monitor for unusual DNS record configurations that could trigger this issue. Avoid using the LMDB backend if possible or implement additional validation on DNS record data submitted via the REST API.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-03-23T12:58:38.267Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e8d83619fe3cd2cdbdacaa
Added to database: 4/22/2026, 2:16:22 PM
Last enriched: 4/22/2026, 2:31:29 PM
Last updated: 4/22/2026, 3:32:45 PM
Views: 6
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