CVE-2026-24027 Crafted zones can lead to increased incoming network traffic
Attackers can craft malicious DNS zones to cause excessive incoming network traffic, potentially leading to service disruption for PowerDNS Recursor users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-24027?
CVE-2026-24027 is a medium-severity denial of service vulnerability in Powerdns Recursor, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Crafted zones can lead to increased incoming network traffic.
Weakness: CWE-294
Which versions are affected by CVE-2026-24027?
It affects 1 product.
Products include Powerdns Recursor.
How do I fix CVE-2026-24027?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-24027 being exploited?
There is no known exploitation of CVE-2026-24027 in the wild and no public exploit code.
Other vulnerabilities in Powerdns Recursor
- CVE-2009-4009 Memory corruption in n/a
- CVE-2020-10030 Memory corruption in n/a
- CVE-2025-59023 Crafted delegations or IP fragments can poison cached delegations in Recursor
- CVE-2025-59030 Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor
- CVE-2023-22617 Denial of service in n/a
Sources
Also known as DEBIAN-CVE-2026-24027, GHSA-m7h2-p2wj-5964, UBUNTU-CVE-2026-24027.