What is CVE-2026-50045?

CVE-2026-50045 is a medium-severity vulnerability in Nlnet Labs Unbound, classified under CWE-406. CVSS score: 5.3/10. Published 2026-07-22.

How severe is CVE-2026-50045?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Nlnet Labs Unbound

CVE-2026-50045

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'. T…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Nlnet Labs Unbound — versions 1.22.0

Weakness classification (CWE)

CWE-406

References

sep@nlnetlabs.nl (vendor-advisory)

Frequently asked questions

What is CVE-2026-50045?: CVE-2026-50045 is a medium-severity vulnerability in Nlnet Labs Unbound, classified under CWE-406. CVSS score: 5.3/10. Published 2026-07-22.
How severe is CVE-2026-50045?: Medium severity. CVSS v3 base score is 5.3 out of 10.