CVE-2023-26437: Powerdns Recursor

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.

Affected products

• Powerdns Recursor: before 4.6.6 (fixed in 4.6.6); from 4.7.0, before 4.7.5 (fixed in 4.7.5); from 4.8.0, before 4.8.4 (fixed in 4.8.4)

Published 2023-04-04. Last modified 2026-06-17.