CVE-2026-6731 — X.509 name constraint bypass via Subject CN treated as a DNS name

CVE-2026-6731

X.509 name constraint bypass via Subject CN treated as a DNS name PUBLISHED

Description (CNA)

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.

Affected (CNA)

Vendor / product	Versions
wolfSSL / wolfSSL	affected 3.9.10 through 5.9.1

CWE

CWE-295

References

https://github.com/wolfSSL/wolfssl/pull/10223
https://www.wolfssl.com/docs/security-vulnerabilities/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.