CVE-2026-4159 LOW

CVE-2026-4159: wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read

Vendor Wolfssl
Product wolfSSL
Weakness CWE-125
Published March 19, 2026
Last update March 20, 2026
View on NVD All CVEs

CVSS base score

1.2/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 19, 2026 CVE published
March 20, 2026 Record updated