CVE-2026-12490 — Bypass of client certificate verification with transfer over TLS

CVE-2026-12490

Bypass of client certificate verification with transfer over TLS PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
NLnet Labs / NSD	affected 4.10.1 before 4.14.3

CWE

CWE-306, CWE-284

References

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12490.txt

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.