Out-of-bounds Read in Wolfssl
CVE-2026-6094
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (21.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Wolfssl — versions 5.8.0
Weakness classification (CWE)
References
- facts@wolfssl.com (Patch, patch, Issue Tracking)
- facts@wolfssl.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-6094?
- CVE-2026-6094 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-06-25.
- How severe is CVE-2026-6094?
- Critical severity. CVSS v3 base score is 9.1 out of 10.