CVE-2026-42005: Allocation of Resources Without Limits or Throttling in PowerDNS Authoritative
CVE-2026-42005 is a vulnerability in PowerDNS Authoritative where an attacker can cause unlimited memory allocation in the internal web server by sending a crafted web request, potentially leading to denial of service. The internal web server is disabled by default, reducing exposure. The vulnerability affects multiple specific versions of PowerDNS Authoritative prior to certain fixed releases.
AI Analysis
Technical Summary
This vulnerability involves allocation of resources without limits or throttling in the internal web server component of PowerDNS Authoritative. An attacker with network access and low privileges can send a specially crafted web request that triggers unlimited memory allocation, causing denial of service. The internal web server is disabled by default, which mitigates exposure unless explicitly enabled. The affected versions include 4.9.0, 5.0.0, 5.1.0, and all versions from 4.9.0 up to but not including 4.9.16, 5.0.0 up to but not including 5.0.6, and 5.1.0 up to but not including 5.1.2. No official patch or remediation level is stated in the available data.
Potential Impact
The impact is limited to denial of service caused by uncontrolled memory allocation in the internal web server. There is no confidentiality or integrity impact reported. Since the internal web server is disabled by default, the attack surface is reduced unless the feature is enabled. The CVSS score is 4.3 (medium severity), reflecting the limited scope and required conditions for exploitation.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Since the internal web server is disabled by default, ensuring it remains disabled prevents exposure to this vulnerability. If the internal web server is enabled, consider disabling it or restricting access until a fix is available. Monitor the vendor advisory for updates on patches or official fixes.
CVE-2026-42005: Allocation of Resources Without Limits or Throttling in PowerDNS Authoritative
Description
CVE-2026-42005 is a vulnerability in PowerDNS Authoritative where an attacker can cause unlimited memory allocation in the internal web server by sending a crafted web request, potentially leading to denial of service. The internal web server is disabled by default, reducing exposure. The vulnerability affects multiple specific versions of PowerDNS Authoritative prior to certain fixed releases.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/pdnsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves allocation of resources without limits or throttling in the internal web server component of PowerDNS Authoritative. An attacker with network access and low privileges can send a specially crafted web request that triggers unlimited memory allocation, causing denial of service. The internal web server is disabled by default, which mitigates exposure unless explicitly enabled. The affected versions include 4.9.0, 5.0.0, 5.1.0, and all versions from 4.9.0 up to but not including 4.9.16, 5.0.0 up to but not including 5.0.6, and 5.1.0 up to but not including 5.1.2. No official patch or remediation level is stated in the available data.
Potential Impact
The impact is limited to denial of service caused by uncontrolled memory allocation in the internal web server. There is no confidentiality or integrity impact reported. Since the internal web server is disabled by default, the attack surface is reduced unless the feature is enabled. The CVSS score is 4.3 (medium severity), reflecting the limited scope and required conditions for exploitation.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Since the internal web server is disabled by default, ensuring it remains disabled prevents exposure to this vulnerability. If the internal web server is enabled, consider disabling it or restricting access until a fix is available. Monitor the vendor advisory for updates on patches or official fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-04-23T11:15:21.199Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d1c0c4853345fc1e6ab04
Added to database: 06/25/2026, 12:16:12 UTC
Last enriched: 06/25/2026, 12:31:00 UTC
Last updated: 06/25/2026, 12:31:00 UTC
Views: 3
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