CVE-2026-4159

LOW

wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read

Title source: cna
STIX 2.1

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)

Core 1

Scores

CVSS v3 3.3
EPSS 0.0009
EPSS Percentile 0.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (2)
wolfSSL/wolfSSL < 5.9.0
wolfssl/wolfssl < 5.9.0
Published Mar 19, 2026
Tracked Since Mar 20, 2026