CVE-2026-12490

HIGH

Bypass of client certificate verification with transfer over TLS

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0016
EPSS Percentile 5.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-284 CWE-306
Status published
Products (2)
NLnet Labs/NSD 4.10.1 - 4.14.3
nlnetlabs/nsd < 4.14.3
Published Jun 25, 2026
Tracked Since Jun 25, 2026