CVE-2026-4159

1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.

CVSS v3 3.3 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/9945	Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

History

29 Apr 2026, 17:27

Type	Values Removed	Values Added
References	~~() https://github.com/wolfSSL/wolfssl/pull/9945 -~~	() https://github.com/wolfSSL/wolfssl/pull/9945 - Issue Tracking, Patch
First Time		Wolfssl Wolfssl wolfssl
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 3.3
Summary		(es) Lectura de montón fuera de límites (OOB) de 1 byte en wc_PKCS7_DecodeEnvelopedData a través de contenido cifrado de longitud cero. Existía una vulnerabilidad en wolfSSL 5.8.4 y anteriores, donde una lectura de montón fuera de límites de 1 byte en wc_PKCS7_DecodeEnvelopedData podría ser activada por un mensaje CMS EnvelopedData manipulado con contenido cifrado de longitud cero. Tenga en cuenta que el soporte de PKCS7 está deshabilitado por defecto.
CPE		cpe:2.3:a:wolfssl:wolfssl::::::::

19 Mar 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 22:16

Updated : 2026-06-17 10:56

NVD link : CVE-2026-4159

Mitre link : CVE-2026-4159

CVE.ORG link : CVE-2026-4159

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-125

Out-of-bounds Read

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