CVE-2026-10592CWE-295

Wildcard DNS SAN bypasses CA name-constraint checks

Medium · published June 25, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
9.2
In the wild
Unconfirmed
What it is

Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA's permitted/excluded DNS name constraints could be accepted.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00199 · 9.2th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-06-25T19:40Z
EPSS history
Timeline
  • 25 JUN 19:40Z
    Wildcard DNS SAN bypasses CA name-constraint checks
    cvelistv5