CVE-2026-42388: Improper Input Validation in PowerDNS Recursor
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
AI Analysis
Technical Summary
This vulnerability arises from incomplete validation of the Start of Authority (SOA) record within a catalog zone in PowerDNS Recursor. Improper input validation may lead to a crash of the service, causing denial of service. The affected versions include 5.2.0, 5.3.0, 5.4.0, and all versions from 5.2.0 up to but not including 5.2.11, 5.3.0 up to but not including 5.3.8, and 5.4.0 up to but not including 5.4.3. The CVSS v3.1 base score is 5.9, reflecting a network attack vector with high attack complexity, no privileges required, no user interaction, and impact limited to availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation of this vulnerability can cause the PowerDNS Recursor service to crash, resulting in denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure of affected PowerDNS Recursor instances to untrusted networks and monitor for service crashes related to SOA record processing.
CVE-2026-42388: Improper Input Validation in PowerDNS Recursor
Description
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
CVSS v3.1
Score 5.9medium
Affected software
pkg:github/pdns-recursorRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from incomplete validation of the Start of Authority (SOA) record within a catalog zone in PowerDNS Recursor. Improper input validation may lead to a crash of the service, causing denial of service. The affected versions include 5.2.0, 5.3.0, 5.4.0, and all versions from 5.2.0 up to but not including 5.2.11, 5.3.0 up to but not including 5.3.8, and 5.4.0 up to but not including 5.4.3. The CVSS v3.1 base score is 5.9, reflecting a network attack vector with high attack complexity, no privileges required, no user interaction, and impact limited to availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation of this vulnerability can cause the PowerDNS Recursor service to crash, resulting in denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure of affected PowerDNS Recursor instances to untrusted networks and monitor for service crashes related to SOA record processing.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-04-27T08:53:58.839Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d38354853345fc10a3532
Added to database: 06/25/2026, 14:16:21 UTC
Last enriched: 06/25/2026, 14:47:33 UTC
Last updated: 06/25/2026, 23:21:25 UTC
Views: 3
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