What is CVE-2026-44687?

CVE-2026-44687 is a low-severity vulnerability in Nlnet Labs Unbound, classified under Off-by-one Error. CVSS score: 3.7/10. Published 2026-07-22.

How severe is CVE-2026-44687?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Nlnet Labs Unbound

CVE-2026-44687

In NLnet Labs Unbound 1.13.2 up to and including 1.25.1, stub or forward zones where the name is below an intermediate labed below a DNSSEC signed zone could be shadowed by the intermediate label's secure NXDOMAIN answer from the parent. T…

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Nlnet Labs Unbound — versions 1.13.2

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

sep@nlnetlabs.nl (vendor-advisory)

Frequently asked questions

What is CVE-2026-44687?: CVE-2026-44687 is a low-severity vulnerability in Nlnet Labs Unbound, classified under Off-by-one Error. CVSS score: 3.7/10. Published 2026-07-22.
How severe is CVE-2026-44687?: Low severity. CVSS v3 base score is 3.7 out of 10.