SB2026072289 - Multiple vulnerabilities in PowerDNS Recursor

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Main Vulnerability Database SB2026072289

SB2026072289 - Multiple vulnerabilities in PowerDNS Recursor

Published: July 22, 2026

Security Bulletin ID SB2026072289
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Insufficient verification of data authenticity (CVE-ID: CVE-2026-52688)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

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


The vulnerability allows a remote attacker to bypass DNSSEC wildcard validation.

The vulnerability exists due to insufficient validation of DNSSEC signatures in the DNSSEC wildcard validation logic when processing a crafted reply from an authoritative server. A remote attacker can send a crafted reply to bypass DNSSEC wildcard validation.


2) Insufficient verification of data authenticity (CVE-ID: CVE-2026-52686)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to poison the cache.

The vulnerability exists due to improper validation in the wildcard CNAME proof validation logic when processing a crafted reply from an authoritative server containing specific wildcards. A remote attacker can send a crafted reply to poison the cache.

Exploitation is limited to very specific cases outside of the attacker's control.


Remediation

Install update from vendor's website.

References