CVE-2026-12490: Nlnetlabs Nsd

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

When a provide-xfr is given with a tls-auth-name, a secondary requesting a transfer should provide a client certificate with that name. However, no client certificate is needed when the request comes in over TLS over the regular tls-port (and not the tls-auth-port) or over over TCP over the regular port, when the other conditions of the provide-xfr rule match.

Affected products

• Nlnetlabs Nsd: before 4.14.3 (fixed in 4.14.3)

Published 2026-06-25. Last modified 2026-06-26.