Out-of-bounds read in wolfSSL - CVE-2026-6094
Published: July 1, 2026
Vulnerability identifier: #VU136635
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-6094
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: wolfSSL
Affected software:
wolfSSL
wolfSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in wc_PKCS7_DecodeEnvelopedData when parsing crafted PKCS7 EnvelopedData. A remote attacker can supply crafted PKCS7 EnvelopedData to cause a denial of service.
This could theoretically be triggered by attacker-supplied data delivered via S/MIME or CMS.
How to mitigate CVE-2026-6094
Install security update from vendor's website.