{"id":"CVE-2026-94200","revision":"c55ee6d87f1a436194e18c0c7a7bc972","records":[{"revision":"c55ee6d87f1a436194e18c0c7a7bc972","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-94200","aliases":[],"title":"TLS 1.3 client ticket store crashed by NewSessionTicket with empty early_data extension in ssl","description":"Improper Validation of Consistency within Input vulnerability in Erlang OTP ssl (tls_handshake_1_3, ssl_handshake and tls_client_ticket_store modules) allows a malicious TLS 1.3 server to cause a denial of service of the ssl application on the client node.\n\nThe TLS 1.3 client decodes the extensions of a NewSessionTicket message as if they came from EncryptedExtensions. It therefore accepts a 0-length early_data extension, a form that is only valid in ClientHello and EncryptedExtensions. With {session_tickets, auto}, the client stores the ticket in the node-global tls_client_ticket_store. On the next automatic resumption, tls_handshake_1_3:get_max_early_data/1 crashes the store with a case_clause. Repeated crashes can exceed the restart intensity of the ssl supervisors, which use the rest_for_one strategy, and take down ssl for all connections on the node.\n\nThis issue affects OTP from OTP\u00A023.3 before OTP\u00A027.3.4.19, OTP\u00A028.5.0.8, and OTP\u00A029.1.2, corresponding to ssl from 10.3 before 11.2.12.14, 11.6.0.7, and 11.7.8.","state":0,"publishedAt":"2026-10-14T16:55:23.328+00:00","modifiedAt":"2026-10-16T20:09:04.559+00:00","affected":[{"ecosystem":"Vendor product","name":"otp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"cpes\": [\n                        \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"ssl_handshake\",\n                        \"tls_handshake_1_3\",\n                        \"tls_client_ticket_store\"\n                    ],\n                    \"packageName\": \"otp\",\n                    \"packageURL\": \"pkg:software-id/erlang.org/otp\",\n                    \"product\": \"OTP\",\n                    \"programFiles\": [\n                        \"lib/ssl/src/ssl_handshake.erl\",\n                        \"lib/ssl/src/tls_handshake_1_3.erl\",\n                        \"lib/ssl/src/tls_client_ticket_store.erl\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"ssl_handshake:decode_extensions/4\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:decode_handshake/2\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:get_max_early_data/1\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:find_ticket/5\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:get_tickets/2\"\n                        }\n                    ],\n                    \"vendor\": \"Erlang\",\n                    \"versions\": [\n                        {\n                            \"changes\": [\n                                {\n                                    \"at\": \"27.3.4.19\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"28.5.0.8\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"29.1.2\",\n                                    \"status\": \"unaffected\"\n                                }\n                            ],\n                            \"lessThan\": \"*\",\n                            \"status\": \"affected\",\n                            \"version\": \"23.3\",\n                            \"versionType\": \"otp\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"ssl","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"cpes\": [\n                        \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"ssl_handshake\",\n                        \"tls_handshake_1_3\",\n                        \"tls_client_ticket_store\"\n                    ],\n                    \"packageName\": \"ssl\",\n                    \"packageURL\": \"pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git\",\n                    \"product\": \"OTP\",\n                    \"programFiles\": [\n                        \"src/ssl_handshake.erl\",\n                        \"src/tls_handshake_1_3.erl\",\n                        \"src/tls_client_ticket_store.erl\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"ssl_handshake:decode_extensions/4\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:decode_handshake/2\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:get_max_early_data/1\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:find_ticket/5\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:get_tickets/2\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/erlang/otp\",\n                    \"vendor\": \"Erlang\",\n                    \"versions\": [\n                        {\n                            \"changes\": [\n                                {\n                                    \"at\": \"11.2.12.14\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"11.6.0.7\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"11.7.8\",\n                                    \"status\": \"unaffected\"\n                                }\n                            ],\n                            \"lessThan\": \"*\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.3\",\n                            \"versionType\": \"otp\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://github.com","name":"erlang/otp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://github.com\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"ssl_handshake\",\n                        \"tls_handshake_1_3\",\n                        \"tls_client_ticket_store\"\n                    ],\n                    \"packageName\": \"erlang/otp\",\n                    \"packageURL\": \"pkg:github/erlang/otp\",\n                    \"product\": \"OTP\",\n                    \"programFiles\": [\n                        \"lib/ssl/src/ssl_handshake.erl\",\n                        \"lib/ssl/src/tls_handshake_1_3.erl\",\n                        \"lib/ssl/src/tls_client_ticket_store.erl\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"ssl_handshake:decode_extensions/4\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:decode_handshake/2\"\n                        },\n                        {\n                            \"name\": \"tls_handshake_1_3:get_max_early_data/1\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:find_ticket/5\"\n                        },\n                        {\n                            \"name\": \"tls_client_ticket_store:get_tickets/2\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/erlang/otp\",\n                    \"vendor\": \"Erlang\",\n                    \"versions\": [\n                        {\n                            \"changes\": [\n                                {\n                                    \"at\": \"66febc190e6dc42a5c4aedbfe250bf9a2edc2d5e\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"00a333bcf2800b69f540369b54167e897dae7219\",\n                                    \"status\": \"unaffected\"\n                                },\n                                {\n                                    \"at\": \"cd0334854bf3ef56dc16f9fb728efe88fb05c4ac\",\n                                    \"status\": \"unaffected\"\n                                }\n                            ],\n                            \"lessThan\": \"*\",\n                            \"status\": \"affected\",\n                            \"version\": \"0abe6f66db0d295cd06b0efab3bdb3caa2803930\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.2,"severity":"HIGH"}],"references":["https://github.com/erlang/otp/security/advisories/GHSA-m5mh-q53w-67jq","https://cna.erlef.org/cves/CVE-2026-94200.html","https://osv.dev/vulnerability/EEF-CVE-2026-94200","https://www.erlang.org/doc/system/versions.html#order-of-versions","https://github.com/erlang/otp/commit/0abe6f66db0d295cd06b0efab3bdb3caa2803930","https://github.com/erlang/otp/commit/66febc190e6dc42a5c4aedbfe250bf9a2edc2d5e","https://github.com/erlang/otp/commit/00a333bcf2800b69f540369b54167e897dae7219","https://github.com/erlang/otp/commit/cd0334854bf3ef56dc16f9fb728efe88fb05c4ac"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-94200","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-94200","identifiers":["CVE-2026-94200"]},"retained":false,"historicalAffected":[]}],"coverage":[]}