CVE-2026-6094: wolfSSL

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Heap buffer overread in wc_PKCS7_DecodeEnvelopedData when parsing crafted PKCS7 EnvelopedData. This could theoretically be triggered by attacker-supplied data delivered via S/MIME or CMS.

Affected products

• wolfSSL wolfSSL: from 5.8.0, before 5.9.2 (fixed in 5.9.2)

Published 2026-06-25. Last modified 2026-06-26.