CVE-2026-52686

Published: Jul 23, 2026Modified: Jul 23, 2026

3.7

Vector

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

Exploitability: 2.2 / Impact: 1.4

Source: security@open-xchange.com (Secondary)

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.

Related CWEs

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (1)

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

Source: security@open-xchange.com

Timeline

No history available yet.