CVE-2026-11703: wolfSSL

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Missing SNI/ALPN binding on stateful (session-ID) resumption, which previously skipped the binding check performed for ticket-based resumption. A cached session could be resumed under a different SNI/ALPN than originally negotiated and, where client-authentication policy differs across virtual hosts, carry the cached peer-authentication state into a context it was not established for. Resumption now verifies the SNI/ALPN binding for all paths and declines (falling back to a full handshake) on mismatch.

Affected products

• wolfSSL wolfSSL: from 3.15.0, before 5.9.2 (fixed in 5.9.2)

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