Heap Buffer Overread in wolfSSL Product by wolfSSL
CVE-2026-6094

6.3MEDIUM

Key Information:

Vendor

Wolfssl

Status
Wolfssl
Vendor
CVE Published:
25 June 2026

What is CVE-2026-6094?

A heap buffer overread vulnerability exists in wolfSSL's handling of the wc_PKCS7_DecodeEnvelopedData function. This issue originates from improper parsing of maliciously crafted PKCS7 EnvelopedData, potentially allowing attackers to exploit the flaw via specially crafted data sent through S/MIME or CMS protocols. It is essential for users to apply patches and stay updated to mitigate the risks associated with this vulnerability.

Affected Version(s)

wolfSSL 5.8.0 <= 5.9.1

References

https://github.com/wolfSSL/wolfssl/pull/10128
patch
https://www.wolfssl.com/docs/security-vulnerabilities/

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dikai Zou
.