CVE-2026-52690: Authentication Bypass by Spoofing in PowerDNS Recursor
CVE-2026-52690 is a vulnerability in PowerDNS Recursor where spoofed replies can cause the system to incorrectly mark an authoritative DNS server as not supporting EDNS. This leads to failure in validating DNSSEC records from that server. The issue affects versions 5.2.0, 5.3.0, and 5.4.0 and has a medium severity rating with a CVSS score of 5.9. No official patch or remediation guidance is currently available.
AI Analysis
Technical Summary
This vulnerability involves spoofing replies to the PowerDNS Recursor, which may cause it to mark an authoritative DNS server IP as lacking EDNS support. As a result, DNSSEC record validation from that server fails, potentially impacting DNS security validation processes. The vulnerability is identified as CWE-290 (Authentication Bypass by Spoofing). It affects PowerDNS Recursor versions 5.2.0, 5.3.0, and 5.4.0. There is no vendor advisory or patch information available at this time.
Potential Impact
The impact is a failure in DNSSEC validation due to spoofed replies causing incorrect assumptions about EDNS support on authoritative servers. This could lead to denial of availability of validated DNS responses, potentially disrupting DNS resolution security. There is no indication of confidentiality or integrity compromise, and 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 a fix is available, administrators should monitor official PowerDNS channels for updates. No specific temporary mitigations are provided in the available data.
CVE-2026-52690: Authentication Bypass by Spoofing in PowerDNS Recursor
Description
CVE-2026-52690 is a vulnerability in PowerDNS Recursor where spoofed replies can cause the system to incorrectly mark an authoritative DNS server as not supporting EDNS. This leads to failure in validating DNSSEC records from that server. The issue affects versions 5.2.0, 5.3.0, and 5.4.0 and has a medium severity rating with a CVSS score of 5.9. No official patch or remediation guidance is currently available.
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 involves spoofing replies to the PowerDNS Recursor, which may cause it to mark an authoritative DNS server IP as lacking EDNS support. As a result, DNSSEC record validation from that server fails, potentially impacting DNS security validation processes. The vulnerability is identified as CWE-290 (Authentication Bypass by Spoofing). It affects PowerDNS Recursor versions 5.2.0, 5.3.0, and 5.4.0. There is no vendor advisory or patch information available at this time.
Potential Impact
The impact is a failure in DNSSEC validation due to spoofed replies causing incorrect assumptions about EDNS support on authoritative servers. This could lead to denial of availability of validated DNS responses, potentially disrupting DNS resolution security. There is no indication of confidentiality or integrity compromise, and 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 a fix is available, administrators should monitor official PowerDNS channels for updates. No specific temporary mitigations are provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-06-08T08:05:31.708Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d38374853345fc10a3593
Added to database: 06/25/2026, 14:16:23 UTC
Last enriched: 06/25/2026, 20:19:01 UTC
Last updated: 06/25/2026, 23:21:52 UTC
Views: 3
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