CVE-2026-6094

Critical

Description

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.

SeverityCritical

CVSS9.1

Exploit probability—

ProductWolfssl

PublishedJun 25, 2026

First seenJun 25, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

wolfssl wolfssl5.9.2 or later

Patches

github.com/wolfSSL/wolfssl/pull/10128

Affected products

Product	Affected versions	Fixed in
wolfssl wolfssl	5.8.0 ≤ v < 5.9.2	5.9.2

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