CVE-2026-12490CWE-284CWE-306

Bypass of client certificate verification with transfer over TLS

High · published June 25, 2026

CVSS v4.0
8.2
EPSS
0%
Percentile
11.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.2 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00216 · 11.5th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-306 · Missing Authentication for Critical Function
Published
2026-06-25T05:24Z
EPSS history
Timeline
  • 25 JUN 05:24Z
    Bypass of client certificate verification with transfer over TLS
    cvelistv5