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.

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…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.3th 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)

CWE-122 — Heap-based Buffer Overflow

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.