---
id: CVE-2026-94200
title: >-
  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 …
summary: >-
  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 …
severity: none
cwe:
  - CWE-1288
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:20:21.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94200'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-94200.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/erlang/otp/commit/00a333bcf2800b69f540369b54167e897dae7219
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/erlang/otp/commit/0abe6f66db0d295cd06b0efab3bdb3caa2803930
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/erlang/otp/commit/66febc190e6dc42a5c4aedbfe250bf9a2edc2d5e
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/erlang/otp/commit/cd0334854bf3ef56dc16f9fb728efe88fb05c4ac
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://github.com/erlang/otp/security/advisories/GHSA-m5mh-q53w-67jq'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-94200'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://www.erlang.org/doc/system/versions.html#order-of-versions'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.681Z'
---

## Overview

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.

The 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.

This issue affects OTP from OTP 23.3 before OTP 27.3.4.19, OTP 28.5.0.8, and OTP 29.1.2, corresponding to ssl from 10.3 before 11.2.12.14, 11.6.0.7, and 11.7.8.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.