# CVE-2026-52782: Missing authorization in openproject

> A project admin can hijack another project's managed storage folder by modifying a parameter, leading to unauthorized access and ACL overwrites.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Jun 2026
- **Updated:** 29 Jun 2026
- **Also known as:** GHSA-3vpx-94qx-xpw6

## What is CVE-2026-52782?

CVE-2026-52782 is a critical missing authorization vulnerability in opf openproject, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through /projects/<A>/settings/project_storages/<A_ps_id> via PATCH parameter "storages_project_storage[project_folder_id]" leads to Access to Unauthorized Resources. A project-admin in one project can hijack the managed Nextcloud or OneDrive folder of another project on the same storage by writing the victim project's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-52782?


## How do I fix CVE-2026-52782?

No fix has been published for CVE-2026-52782 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-52782 being exploited?

There is no known exploitation of CVE-2026-52782 in the wild and no public exploit code.

Public exploit code:

- CVE-2026-52782 - OpenProject - Critical 9.9 - Authenticated PATCH /projects/{identifier}/settings/project_storages/{id} - Authenticated IDOR (Project Storage Folder Hijack) (github_poc): https://github.com/abraxas/CVE-2026-52782

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-52782 and fix it if it is affected.

What it is: CVE-2026-52782 is a critical missing authorization vulnerability in opf openproject, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-52782 in the wild and no public exploit code.

Affected product: opf openproject. 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-2026-52782/ (Markdown: https://insights.sbomify.com/CVE-2026-52782/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-52782
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-52782
- OSV: https://osv.dev/vulnerability/CVE-2026-52782

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-52782/
Summaries are generated and may contain mistakes; the official description above is the record.