Name: CVE-2026-52686: Improper Verification of Cryptographic Signature
Creator: Rapid7
Published: 2026-07-23T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-52686, CWE-347, CVSS 3.7, EPSS 0.00162

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.

CVSS Details

CVSS 3.1 Base Score: 3.7
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade pdns-recursor	Jul 29, 2026	Jul 23, 2026
Debian	—	Upgrade pdns-recursor	Jul 28, 2026	Jul 28, 2026
Freebsd	—	Upgrade powerdns-recursor	Aug 7, 2026	Aug 5, 2026

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CVSS Details

Covered by Rapid7

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