---
title: "CVE-2026-45083: Goobi viewer - Core: Unauthenticated Solr Streaming Expression Proxy"
url: https://erroneo.us/security/cve/CVE-2026-45083/
description: "CVE-2026-45083 (io.goobi.viewer:viewer-core (Maven)): The Goobi viewer is a web application that allows digitised material to be displayed in a web browser.…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-27
date_modified: 2026-06-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-45083"
kev: false
cvss: 9.8
epss: 0.00653
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-45083: Goobi viewer - Core: Unauthenticated Solr Streaming Expression Proxy

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 51: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 51% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes io.goobi.viewer:viewer-core (Maven) >= 4.8.0, <= 26.04, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From 4.8.0 to before 26.04.1, the Goobi viewer REST endpoint POST /api/v1/index/stream accepted an arbitrary Solr streaming expression from unauthenticated network clients and forwarded it to the backend Solr server without restriction. An attacker could read the complete Solr index and, in default Solr deployments, also modify or delete indexed records. This vulnerability is fixed in 26.04.1.

## Affected packages

- Maven `io.goobi.viewer:viewer-core` >= 4.8.0, <= 26.04 → fixed: none listed

## Affected products (CVE record)

- intranda goobi-viewer-core: >= 4.8.0, < 26.04.1

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.65% probability of exploitation activity in the next 30 days; percentile 51.

## Sources

- [GitHub Advisory GHSA-2rgp-f66f-4499](https://github.com/advisories/GHSA-2rgp-f66f-4499)
- [CVE.org record CVE-2026-45083](https://www.cve.org/CVERecord?id=CVE-2026-45083)
- [NVD entry CVE-2026-45083](https://nvd.nist.gov/vuln/detail/CVE-2026-45083)
- [github.com](https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-2rgp-f66f-4499)
- [github.com](https://github.com/intranda/goobi-viewer-core/commit/326980f24ce1e7cfabf658dd5f615934ca68ebbd)
- [github.com](https://github.com/intranda/goobi-viewer-core/commit/6bfb1cbd4250b0b347e84a80f38e8bf46acac705)
- [github.com](https://github.com/intranda/goobi-viewer-core/releases/tag/v26.04.1)

---
Source page: https://erroneo.us/security/cve/CVE-2026-45083/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt