Buffer overflow in Wolfssl
CVE-2026-5448
X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (2.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/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-2026-5448?
- CVE-2026-5448 is a medium-severity vulnerability in Wolfssl, classified under Heap-based Buffer Overflow. CVSS score: 4.3/10. Published 2026-04-10.
- How severe is CVE-2026-5448?
- Medium severity. CVSS v3 base score is 4.3 out of 10.