Is CVE-2026-50045 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-50045?

CVE-2026-50045 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-50045

Description

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.