# CVE-2026-90521: jaychouchannel Tourism-Management-System CRUD MenpiaodingdanController.java authorization

> Attackers can bypass authorization in the MenpiaodingdanController to access protected CRUD operations remotely.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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:** 13 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-h827-vf5f-hc9f

## What is CVE-2026-90521?

CVE-2026-90521 is a medium-severity authentication bypass vulnerability in jaychouchannel Tourism-Management-System, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in jaychouchannel Tourism-Management-System up to 8122bf020d91199eddfff3ee02d1632a70a9a132. This issue affects some unknown processing of the file MenpiaodingdanController.java of the component CRUD. The manipulation of the argument ID results in authorization bypass. It is possible to launch the attack remotely. The exploit has been made public and could be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The patch is identified as d44ec3aa0bd2a72c8800e3befb0a9a96a6491b86. It is best practice to apply a patch to resolve this issue.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-90521?


## How do I fix CVE-2026-90521?

No fix has been published for CVE-2026-90521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90521 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90521 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90521 and fix it if it is affected.

What it is: CVE-2026-90521 is a medium-severity authentication bypass vulnerability in jaychouchannel Tourism-Management-System, published on 13 Sep 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-2026-90521 exists.

Affected product: jaychouchannel Tourism-Management-System. 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-2026-90521/ (Markdown: https://insights.sbomify.com/CVE-2026-90521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90521
- OSV: https://osv.dev/vulnerability/CVE-2026-90521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90521/
Summaries are generated and may contain mistakes; the official description above is the record.