CVE-2026-52686

LOW

PowerDNS Recursor - Wildcard CNAME Proof Validation Bypass

Title source: rule

Description

The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.

References (1)

Core 1

Core References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html

Scores

CVSS v3 3.7

EPSS 0.0011

EPSS Percentile 1.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-347

Status published

Products (3)

PowerDNS/Recursor 5.2.0 - 5.2.12

PowerDNS/Recursor 5.3.0 - 5.3.9

PowerDNS/Recursor 5.4.0 - 5.4.4

Published Jul 23, 2026

Tracked Since Jul 23, 2026