CVE-2026-6450: wolfSSL

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.

Affected products

• wolfSSL wolfSSL: from 4.3.0, before 5.9.2 (fixed in 5.9.2)

Published 2026-06-25. Last modified 2026-06-27.