---
id: CVE-2026-90584
title: A weakness has been identified in TooTallNate Java-WebSocket up to 1.6.1
summary: >-
  A weakness has been identified in TooTallNate Java-WebSocket up to 1.6.1. The
  impacted element is the function processFrameContinuousAndNonFin of the file
  Draft_6455.java of the component Fragmentation Handler. Executing a
  manipulation c…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-400
  - CWE-770
vendor: TooTallNate
product: Java-WebSocket
affected:
  - Java-WebSocket 1.6.0
  - Java-WebSocket 1.6.1
published: '2026-09-13'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:56:48.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90584'
references:
  - url: 'https://github.com/TooTallNate/Java-WebSocket/'
    label: cna@vuldb.com
  - url: 'https://github.com/TooTallNate/Java-WebSocket/issues/1508'
    label: cna@vuldb.com
  - url: 'https://github.com/TooTallNate/Java-WebSocket/pull/1509'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90584'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/913786'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403169'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403169/cti'
    label: cna@vuldb.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90584.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90584'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90584'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T16:59:41.703510Z'
ingestedAt: '2026-09-14T15:23:07.468Z'
epss: 0.00724
epssPercentile: 0.52009
---

## Overview

A weakness has been identified in TooTallNate Java-WebSocket up to 1.6.1. The impacted element is the function processFrameContinuousAndNonFin of the file Draft_6455.java of the component Fragmentation Handler. Executing a manipulation can lead to allocation of resources. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The pull request to fix this issue awaits acceptance.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90584.json)