What is CVE-2026-5772?

CVE-2026-5772 is a medium-severity vulnerability in Wolfssl, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2026-04-09.

How severe is CVE-2026-5772?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Wolfssl

CVE-2026-5772

A 1-byte stack buffer over-read was identified in the MatchDomainName function (src/internal.c) during wildcard hostname validation when the LEFT_MOST_WILDCARD_ONLY flag is active. If a wildcard * exhausts the entire hostname string, the…

EPSS: 0.000 (14.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Wolfssl — versions 0

Weakness classification (CWE)

CWE-126 — Buffer Over-read

References

facts@wolfssl.com (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-5772?: CVE-2026-5772 is a medium-severity vulnerability in Wolfssl, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2026-04-09.
How severe is CVE-2026-5772?: Medium severity. CVSS v3 base score is 5.3 out of 10.