CVE-2026-42387

Insufficient input validation in ZoneToCache

CVSS 5.9 MEDIUMEPSS 0.4%CWE-20

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.

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

Affected products

PowerDNS · Recursor

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References

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