Authentication Bypass by Primary Weakness in wolfSSL - CVE-2026-94419
Published: October 5, 2026
Vulnerability identifier: #VU153291
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-94419
CWE-ID: CWE-305
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to impersonate a previously authenticated server.
The vulnerability exists due to improper session management in the process-global SessionCache when handling legacy client session references. A remote attacker can cause a session cache entry to be overwritten through a matching TLS session ID to impersonate a previously authenticated server.
The issue requires the legacy wolfSSL_get_session() or SSL_get_session() flow followed by wolfSSL_set_session() and affects TLS 1.2 and earlier or DTLS 1.2 and earlier.
Affected software
wolfSSL
How to mitigate CVE-2026-94419
Install security update from vendor's website.
wolfSSL - update to 5.9.4