Insufficient verification of data authenticity in PowerDNS Recursor - CVE-2026-52688
Published: July 22, 2026
Vulnerability identifier: #VU139170
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-52688
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
PowerDNS Recursor
Debian Linux
Fedora
pdns-recursor (Debian package)
pdns-recursor
Debian Linux
Fedora
pdns-recursor (Debian package)
pdns-recursor
How to mitigate CVE-2026-52688
Install security update from vendor's website.
PowerDNS Recursor - addressed in versions 5.2.12, 5.3.9, 5.4.4
pdns-recursor (Debian package) - update to 5.2.12-0+deb13u1
pdns-recursor - addressed in versions 5.4.6-2.el10_2, 5.4.6-2.el10_3, 5.4.6-2.fc44, 5.4.6-2.fc45
pdns-recursor (Debian package) - update to 5.2.12-0+deb13u1
pdns-recursor - addressed in versions 5.4.6-2.el10_2, 5.4.6-2.el10_3, 5.4.6-2.fc44, 5.4.6-2.fc45