CVE-2026-52690 PUBLISHED

Spoofed answers can mark an authoritative non-EDNS capable

Assigner: OX
Reserved: 08.06.2026 Published: 25.06.2026 Updated: 25.06.2026

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 5.9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	PowerDNS
Product	Recursor
Versions	Default: unaffected affected from 5.2.0 to 5.2.11 (excl.) affected from 5.3.0 to 5.3.8 (excl.) affected from 5.4.0 to 5.4.3 (excl.)

Credits

Mehtab Zafar finder

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html

Problem Types

Authentication Bypass by Spoofing CWE