# CVE-2026-28354: ClipBucket v5 has IDOR in Collection Item Management

> Authenticated attackers can modify other users' collection items due to missing authorization checks in ClipBucket v5.

- **Severity:** Medium 5.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P`)
- **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:** 27 Feb 2026
- **Updated:** 27 Feb 2026

## What is CVE-2026-28354?

CVE-2026-28354 is a medium-severity missing authorization vulnerability in MacWarrior clipbucket-v5, published on 27 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ClipBucket v5 is an open source video sharing platform. Prior to version 5.5.3 #59, collection item operations are vulnerable to authorization flaws, allowing a normal authenticated user to modify another user’s collection items. This affects both add item (/actions/add_to_collection.php) due to missing authorization checks and delete item (/manage_collections.php?mode=manage_items...) due to a broken ownership check in removeItemFromCollection(). As a result, attackers can insert and remove items from collections they do not own. Version 5.5.3 #59 fixes the issue.

Weakness: CWE-863 (Incorrect Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-28354?

It affects 1 product.


Products: Oxygenz Clipbucket.

## How do I fix CVE-2026-28354?

No fix has been published for CVE-2026-28354 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-28354 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28354 exists.

## Other vulnerabilities in MacWarrior clipbucket-v5

- [CVE-2026-21875](https://insights.sbomify.com/CVE-2026-21875/): ClipBucket v5 Vulnerable to Blind SQL Injection through Channel Comments (critical 9.8)
- [CVE-2025-67418](https://insights.sbomify.com/CVE-2025-67418/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2025-21624](https://insights.sbomify.com/CVE-2025-21624/): ClipBucket V5 Playlist Cover File Upload to Remote Code Execution (critical 9.8)
- [CVE-2024-54135](https://insights.sbomify.com/CVE-2024-54135/): Untrusted Deserialization in ClipBucket-v5 Version 2.0 to 5.5.1 Revision 199 (critical 9.8)
- [CVE-2024-54136](https://insights.sbomify.com/CVE-2024-54136/): Untrusted Deserialization in ClipBucket-v5 Version 5.5.1 Revision 199 and Below (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-28354 and fix it if it is affected.

What it is: CVE-2026-28354 is a medium-severity missing authorization vulnerability in MacWarrior clipbucket-v5, published on 27 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28354 exists.

Affected product: MacWarrior clipbucket-v5. 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-2026-28354/ (Markdown: https://insights.sbomify.com/CVE-2026-28354/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-28354
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28354
- OSV: https://osv.dev/vulnerability/CVE-2026-28354

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-28354/
Summaries are generated and may contain mistakes; the official description above is the record.