Vulnerability · Published Jun 25, 2026 · Assigned by wolfSSL
CVE-2026-11703Missing SNI/ALPN binding on stateful (session-ID) TLS session resumption
Medium 6.0
In plain English
A medium-severity improper authentication in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | wolfssl | 5.9.2-r0 | ALPINE-CVE-2026-11703 |
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2026-11703 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2026-11703 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-11703 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-11703 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-11703 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-11703 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-11703 |
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N