SB20261021103 - Remote DoS in PowerDNS Authoritative Server

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Main Vulnerability Database SB20261021103

SB20261021103 - Remote DoS in PowerDNS Authoritative Server

Published: October 21, 2026

Security Bulletin ID SB20261021103
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-73206)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service in PowerDNS Recursor.

The vulnerability exists due to insufficient resource limits in DNS name decompression when processing compression pointers in DNS packets. A remote attacker can send a specially crafted DNS reply from a malicious server to trigger excessive resource consumption and cause a denial of service.


Remediation

Install update from vendor's website.

References