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

> Unauthenticated attackers can access the Solr streaming expression proxy to read, modify, or delete indexed records in Goobi viewer.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 May 2026
- **Updated:** 28 May 2026
- **Also known as:** GHSA-2rgp-f66f-4499

## What is CVE-2026-45083?

CVE-2026-45083 is a critical missing authorization vulnerability in intranda goobi-viewer-core, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-45083?

2 open source packages ship an affected version, including io.goobi.viewer:viewer-core.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `io.goobi.viewer:viewer-core` | Maven | From 4.8.0 to 26.04 | None |
| `io.goobi.viewer:viewer-core` | Maven | From 4.8.0 to 26.04 | None |

## How do I fix CVE-2026-45083?

No fix has been published for CVE-2026-45083 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45083 being exploited?

There is no known exploitation of CVE-2026-45083 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45083 and fix it if it is affected.

What it is: CVE-2026-45083 is a critical missing authorization vulnerability in intranda goobi-viewer-core, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-45083 in the wild and no public exploit code.

Affected packages and fixed versions:
- io.goobi.viewer:viewer-core (Maven): affected from 4.8.0 up to 26.04; no fix listed
- io.goobi.viewer:viewer-core (Maven): affected from 4.8.0 up to 26.04; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45083/ (Markdown: https://insights.sbomify.com/CVE-2026-45083/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45083
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45083
- OSV: https://osv.dev/vulnerability/CVE-2026-45083

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45083/
Summaries are generated and may contain mistakes; the official description above is the record.