CVE-2026-11703 — Missing SNI/ALPN binding on stateful (session-ID) TLS session resumption
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…
Published: 2026-06-25 · CVSS: 6.0 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7