---
id: "CVE-2026-46651"
kind: "vulnerability"
aliases: ["CVE-2026-46651"]
title: "Goobi viewer: unauthenticated WebSocket download endpoint allows server-side request abuse"
severity: "critical"
cvss: 9.8
epss: 0.00697
exploited: false
status: "open"
category: "package"
products: [{"name": "goobi-viewer-core", "fixed": ["26.05"], "affected": ">= 24.03, < 26.05", "ecosystem": "maven"}]
ecosystems: ["maven"]
tags: ["goobi-viewer", "java", "package", "runtime", "self-hosted", "solr", "ssrf", "websocket"]
not_affected_if: ["version-outside-24.03-to-26.05"]
published_at: "2026-10-23T15:17:31+00:00"
first_seen_at: "2026-10-23T21:57:34+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46651", "first_seen_at": "2026-10-23T21:57:34+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T22:02:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-46651", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# Goobi viewer: unauthenticated WebSocket download endpoint allows server-side request abuse

The DownloadTaskEndpoint WebSocket at /tasks/download/monitor.socket accepts download requests from unauthenticated users in goobi-viewer-core versions 24.03 up to 26.05. The sources (CVSS 9.8, tagged ssrf) indicate an attacker can make the server fetch content on their behalf without logging in.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- maven:goobi-viewer-core affected >= 24.03, < 26.05 fixed 26.05

## How to check

Check the Maven dependency version of goobi-viewer-core in the project pom or build file; affected if 24.03 <= version < 26.05.

## Fix

Upgrade goobi-viewer-core to 26.05 or later.

## Timeline

- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-46651
- 2026-10-23T22:02:52+00:00 analyst — Read GHSA-79jg-3m2m-jgc8 (vendor advisory, Jun 18 2026) and v26.05 release; no exploitation or PoC found in search results; no social search done.
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-46651

## Documents

- [advisory] GHSA-79jg-3m2m-jgc8 Unauthenticated SSRF and LFI via DownloadTaskEndpoint https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-79jg-3m2m-jgc8
- [fix] goobi-viewer-core v26.05 https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05

## From the sources

The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 24.03 to before version 26.05, the DownloadTaskEndpoint WebSocket endpoint (/tasks/download/monitor.socket) in goobi-viewer-core accepts download requests from unauthenticated users. This issue has been patched in version 26.05.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_