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PowerDNS Authoritative EUVD-2026-31259

| CVE-2026-42001 HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-05-21 OX GHSA-mxqj-8r4c-fp83
Denial Of Service
7.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
May 21, 2026 - 11:01 EUVD
Analysis Generated
May 21, 2026 - 10:45 vuln.today

DescriptionNVD

Insufficient Validation of Autoprimary SOA Queries

AnalysisAI

Remote denial of service in PowerDNS Authoritative Server arises from insufficient validation of SOA queries received via the Autoprimary (formerly 'supermaster') replication mechanism, allowing unauthenticated network-based attackers to disrupt service availability. The flaw carries a CVSS 7.5 (AV:N/AC:L/PR:N/UI:N) with availability-only impact, and no public exploit identified at time of analysis. …

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RemediationAI

Within 24 hours: Inventory all PowerDNS Authoritative Server instances and determine whether Autoprimary replication is enabled; disable the feature if operationally feasible. Within 7 days: Deploy firewall rules restricting SOA query sources to whitelisted secondary nameserver IP addresses, implement per-source rate limiting on DNS responses, and enable real-time alerting for query volume anomalies. …

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Vendor StatusVendor

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EUVD-2026-31259 vulnerability details – vuln.today
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