Insufficient input validation in ZoneToCache_CVE-2026-42387

5.9 / 10

MEDIUM

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

Description

A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.

Basic Information

ID CVE-2026-42387

Source OX

Published Jun 25, 2026 at 12:59

Modified Jun 25, 2026 at 14:41

Affected Product

Vendor PowerDNS

Product Recursor

Version 5.2.0

Affected Versions PowerDNS Recursor 5.2.0
PowerDNS Recursor 5.3.0
PowerDNS Recursor 5.4.0

CWE Classification

CWE-20

References

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

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