# CVE-2026-23623: Collabora Online vulnerable to Authorization Bypass

> Users with view-only rights can bypass download restrictions using a keyboard shortcut to retrieve local copies of shared files.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Feb 2026
- **Updated:** 6 Feb 2026
- **Also known as:** GHSA-68v6-r6qq-mmq2

## What is CVE-2026-23623?

CVE-2026-23623 is a medium-severity missing authorization vulnerability in CollaboraOnline online, published on 5 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Collabora Online is a collaborative online office suite based on LibreOffice technology. Prior to Collabora Online Development Edition version 25.04.08.2 and prior to Collabora Online versions 23.05.20.1, 24.04.17.3, and 25.04.7.5, a user with view-only rights and no download privileges can obtain a local copy of a shared file. Although there are no corresponding buttons in the interface, pressing Ctrl+Shift+S initiates the file download process. This allows the user to bypass the access restrictions and leads to unauthorized data retrieval. This issue has been patched in Collabora Online Development Edition version 25.04.08.2 and Collabora Online versions 23.05.20.1, 24.04.17.3, and 25.04.7.5.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-23623?


## How do I fix CVE-2026-23623?

No fix has been published for CVE-2026-23623 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-23623 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23623 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-23623 and fix it if it is affected.

What it is: CVE-2026-23623 is a medium-severity missing authorization vulnerability in CollaboraOnline online, published on 5 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23623 exists.

Affected product: CollaboraOnline online. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-23623/ (Markdown: https://insights.sbomify.com/CVE-2026-23623/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23623
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23623
- OSV: https://osv.dev/vulnerability/CVE-2026-23623

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-23623/
Summaries are generated and may contain mistakes; the official description above is the record.