# CVE-2026-6572: Collabora KodExplorer fileUpload Endpoint share.class.php improper authorization

> Remote attackers can bypass authorization checks in the fileUpload endpoint to access or modify shared files.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Apr 2026
- **Updated:** 20 Apr 2026
- **Also known as:** GHSA-3v8q-qmgr-97jh

## What is CVE-2026-6572?

CVE-2026-6572 is a medium-severity missing authorization vulnerability in Collabora KodExplorer, published on 19 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A security vulnerability has been detected in Collabora KodExplorer up to 4.52. Affected by this issue is some unknown functionality of the file /app/controller/share.class.php of the component fileUpload Endpoint. The manipulation of the argument fileUpload leads to improper authorization. Remote exploitation of the attack is possible. The attack's complexity is rated as high. The exploitation is known to be difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-285 (Improper Authorization), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-6572?


## How do I fix CVE-2026-6572?

No fix has been published for CVE-2026-6572 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6572 being exploited?

There is no known exploitation of CVE-2026-6572 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6572 and fix it if it is affected.

What it is: CVE-2026-6572 is a medium-severity missing authorization vulnerability in Collabora KodExplorer, published on 19 Apr 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-2026-6572 in the wild and no public exploit code.

Affected product: Collabora KodExplorer. 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-2026-6572/ (Markdown: https://insights.sbomify.com/CVE-2026-6572/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6572
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6572
- OSV: https://osv.dev/vulnerability/CVE-2026-6572

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6572/
Summaries are generated and may contain mistakes; the official description above is the record.