Out-of-bounds Read in Wolfssl
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 cr…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Wolfssl — versions 0
Weakness classification (CWE)
References
- facts@wolfssl.com (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-4159?
- CVE-2026-4159 is a low-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-03-19.
- How severe is CVE-2026-4159?
- Low severity. CVSS v3 base score is 3.3 out of 10.