CVE-2026-6412: wolfSSL

Medium severity, CVSS 4.3. EPSS: 0.1% chance of exploitation in the next 30 days.

Certificate policy and RFC 8446 compliance concerns regarding the continued acceptance of SHA-1/MD5 in certificate processing.

Affected products

• wolfSSL wolfSSL: from 3.9.10, before 5.9.2 (fixed in 5.9.2)

Published 2026-06-25. Last modified 2026-06-27.