What is CVE-2026-10592?

CVE-2026-10592 is a medium-severity vulnerability in Wolfssl, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2026-06-25.

How severe is CVE-2026-10592?

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

Vulnerability in Wolfssl

CVE-2026-10592

Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA's permitted/excluded DNS name constraints could be accepted.

Vulnerability class: Improper Certificate Validation

EPSS: 0.001 (2.5th 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:L/A:N.

Affected products

Wolfssl — versions 3.9.10

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

facts@wolfssl.com (Patch, patch, Issue Tracking)
facts@wolfssl.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-10592?: CVE-2026-10592 is a medium-severity vulnerability in Wolfssl, classified under Improper Certificate Validation. CVSS score: 5.3/10. Published 2026-06-25.
How severe is CVE-2026-10592?: Medium severity. CVSS v3 base score is 5.3 out of 10.