CVE-2026-4159

LOW

wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read

Title source: cna

Description

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.

References (1)

https://github.com/wolfSSL/wolfssl/pull/9945

Scores

CVSS v4 1.2

EPSS 0.0002

EPSS Percentile 5.7%

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green

Details

CWE

CWE-125

Status published

Products (1)

wolfSSL/wolfSSL < 5.9.0

Published Mar 19, 2026

Tracked Since Mar 20, 2026