Heap-based Buffer Overflow Affecting wolfssl/wolfssl package, versions [,5.9.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-WOLFSSLWOLFSSL-15990556
- published12 Apr 2026
- disclosed10 Apr 2026
- creditUnknown
Introduced: 10 Apr 2026
NewCVE-2026-5448 (opens in a new tab)How to fix?
Upgrade wolfssl/wolfssl to version 5.9.1 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the wolfSSL_X509_notAfter or wolfSSL_X509_notBefore functions when parsing date fields from a specially crafted X.509 certificate via the compatibility layer API. An attacker can cause a buffer overflow by providing a malicious certificate to an application that directly calls these APIs. This is only exploitable if the application invokes these APIs directly; it does not affect TLS or certificate verification operations.