---
id: CVE-2026-55463
title: >-
  Goobi viewer: WebSocket endpoints lack server-side authentication and origin
  validation
summary: >-
  The Goobi viewer is a web application that allows digitised material to be
  displayed in a web browser. From version 4.11.0 to before version 26.05,
  several Jakarta WebSocket endpoints in goobi-viewer-core
  (DownloadTaskEndpoint, CampaignE…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-306
  - CWE-862
  - CWE-1385
vendor: intranda
product: goobi-viewer-core
affected:
  - 'goobi-viewer-core >= 4.11.0, < 26.05'
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T14:17:06.825Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55463'
references:
  - url: >-
      https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-h5m9-fpvw-qr36
    label: >-
      https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-h5m9-fpvw-qr36
  - url: >-
      https://github.com/intranda/goobi-viewer-core/commit/8714ca81065d2c2c6e614a1ee6753de65cbe3412
    label: >-
      https://github.com/intranda/goobi-viewer-core/commit/8714ca81065d2c2c6e614a1ee6753de65cbe3412
  - url: 'https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05'
    label: 'https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05'
tags:
  - cve.org
ingestedAt: '2026-10-23T14:28:08.692Z'
---

## Overview

The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 4.11.0 to before version 26.05, several Jakarta WebSocket endpoints in goobi-viewer-core (DownloadTaskEndpoint, CampaignEndpoint, AutocompleteEndpoint, UserEndpoint) accept connections without verifying that the associated HttpSession belongs to a logged-in user, and none validate the Origin header against an allowlist. An unauthenticated attacker can therefore connect to these endpoints; through CampaignEndpoint this allows polluting the in-process crowdsourcing page-lock map and broadcasting forged lock messages, disrupting reviewers' work. This issue has been patched in version 26.05.

## Affected

- `goobi-viewer-core >= 4.11.0, < 26.05`

## Remediation

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