CVE-2026-5448
Medium
Description
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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductWolfssl
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- wolfssl wolfssl5.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wolfssl wolfssl | v < 5.9.1 | 5.9.1 |
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