CVE-2026-4159
Low · 3.3CVSS
3.3
EPSS
0.1%
Published
Mar 19, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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