CVE-2026-6731

HighCVSS 7.5/10Last modified Jun 27, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-295

Affected software

Vendor	Product	Versions
wolfSSL	wolfSSL	>= 3.9.10, <= 5.9.1

References

https://github.com/wolfSSL/wolfssl/pull/10223Issue Tracking, Patch
https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory

Timeline

Published: Jun 25, 2026
Last modified: Jun 27, 2026
NVD status: Analyzed

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