CVE-2026-50045

A vulnerability in Unbound allows a remote attacker to bypass upstream amplification limits by querying a deeply nested name under a DNSSEC-signed parent. This triggers excessive outbound traffic per query, potentially causing a denial of service (DoS).

A Moderate flaw in Unbound allows remote attackers to bypass max-global-quota limits using crafted DNSSEC queries. This causes upstream traffic amplification, potentially leading to a Denial of Service (DoS). This issue specifically affects Unbound versions 1.22.0 through 1.25.1.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Restrict recursive DNS access strictly to trusted networks using firewall access controls, reloading the service to apply changes. Additionally, configure Rate Limiting on outbound traffic to throttle anomalous spikes and mitigate amplification risks.