Improper Validation of Consistency within Input in Erlang OTP - CVE-2026-94200
Published: October 14, 2026
Vulnerability identifier: #VU155790
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-94200
CWE-ID: CWE-1288
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a node-wide denial of service affecting SSL functionality.
The vulnerability exists due to improper validation of consistency within input in the node-global tls_client_ticket_store when automatically resuming TLS 1.3 sessions. A remote attacker can supply a crafted NewSessionTicket containing zero-length early_data to cause a node-wide denial of service affecting SSL functionality.
Exploitation requires a connection to a malicious or man-in-the-middle TLS server and automatic ticket handling with {session_tickets, auto} enabled.
Affected software
Erlang OTP
How to mitigate CVE-2026-94200
Install security update from vendor's website.
Erlang OTP - addressed in versions 27.3.4.19, 28.5.0.8, 29.1.2