Resource exhaustion in PowerDNS Recursor - CVE-2026-24027
Published: February 9, 2026
Vulnerability identifier: #VU122484
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-24027
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can publish a query a crafted zone and increase network traffic.
Affected software
PowerDNS Recursor
Debian Linux
pdns-recursor (Debian package)
Debian Linux
pdns-recursor (Debian package)
How to mitigate CVE-2026-24027
Install updates from vendor's website.
PowerDNS Recursor - addressed in versions 5.1.10, 5.2.8, 5.3.5
pdns-recursor (Debian package) - update to 5.2.8-0+deb13u1
pdns-recursor (Debian package) - update to 5.2.8-0+deb13u1