# CVE-2026-28503: Tandoor Recipes has Cross-Space IDOR in SyncViewSet.query_synced_folder: missing space scoping on get_object_or_404

> An admin in one space can trigger sync operations and view logs for another space due to missing space scoping in the API.

- **Severity:** Medium 5.5 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Mar 2026
- **Updated:** 27 Mar 2026
- **Also known as:** GHSA-6qpw-gwcq-68fv

## What is CVE-2026-28503?

CVE-2026-28503 is a medium-severity missing authorization vulnerability in TandoorRecipes recipes, published on 26 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. In versions prior to 2.6.0, the `SyncViewSet.query_synced_folder()` action in `cookbook/views/api.py` (line 903) fetches a Sync object using `get_object_or_404(Sync, pk=pk)` without including `space=request.space` in the filter. This allows an admin user in Space A to trigger sync operations (Dropbox/Nextcloud/Local import) on Sync configurations belonging to Space B, and view the resulting sync logs. Version 2.6.0 patches the issue.

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

## Which versions are affected by CVE-2026-28503?

It affects 1 product.


Products: Tandoor Recipes.

## How do I fix CVE-2026-28503?

No fix has been published for CVE-2026-28503 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-28503 being exploited?

There is no known exploitation of CVE-2026-28503 in the wild and no public exploit code.

## Other vulnerabilities in TandoorRecipes recipes

- [CVE-2025-23211](https://insights.sbomify.com/CVE-2025-23211/): Tandoor Recipes - SSTI - Remote Code Execution (critical 10.0)
- [CVE-2026-33152](https://insights.sbomify.com/CVE-2026-33152/): Tandoor Recipes Vulnerable to Unrestricted Brute-Force via BasicAuthentication (critical 9.1)
- [CVE-2025-23213](https://insights.sbomify.com/CVE-2025-23213/): Tandoor Recipes - Stored XSS through Unrestricted File Upload (high 8.7)
- [CVE-2026-35488](https://insights.sbomify.com/CVE-2026-35488/): Tandoor Recipes — CustomIsShared permits DELETE/PUT on RecipeBook by shared (read-only) users (high 8.1)
- [CVE-2026-35045](https://insights.sbomify.com/CVE-2026-35045/): Tandoor Recipes Affected by Private Recipe Exposure and Unauthorized Modification (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-28503 and fix it if it is affected.

What it is: CVE-2026-28503 is a medium-severity missing authorization vulnerability in TandoorRecipes recipes, published on 26 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-28503 in the wild and no public exploit code.

Affected product: TandoorRecipes recipes. 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-2026-28503/ (Markdown: https://insights.sbomify.com/CVE-2026-28503/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-28503
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28503
- OSV: https://osv.dev/vulnerability/CVE-2026-28503

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-28503/
Summaries are generated and may contain mistakes; the official description above is the record.