# CVE-2026-90523: jaychouchannel Tourism-Management-System User Register Endpoint UsersController.java privileges management

> Remote attackers can escalate privileges via the user registration endpoint in the Tourism Management System, requiring a patch to mitigate.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/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:** 13 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-phcr-xqg5-c575

## What is CVE-2026-90523?

CVE-2026-90523 is a medium-severity vulnerability in jaychouchannel Tourism-Management-System, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was identified in jaychouchannel Tourism-Management-System up to 229956e20dbd4a80eeff14535e44d3099502af09. The affected element is an unknown function of the file travel/src/main/java/com/controller/UsersController.java of the component User Register Endpoint. Such manipulation of the argument UsersEntity leads to improper privilege management. The attack can be launched remotely. The exploit is publicly available and might be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The name of the patch is 84d8ec384f669df3985293dab293bb7b477efa64. Applying a patch is advised to resolve this issue.

Weakness: CWE-269 (Improper Privilege Management), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-90523?


## How do I fix CVE-2026-90523?

No fix has been published for CVE-2026-90523 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90523 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90523 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90523 and fix it if it is affected.

What it is: CVE-2026-90523 is a medium-severity vulnerability in jaychouchannel Tourism-Management-System, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90523 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-2026-90523/ (Markdown: https://insights.sbomify.com/CVE-2026-90523/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90523
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90523
- OSV: https://osv.dev/vulnerability/CVE-2026-90523

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90523/
Summaries are generated and may contain mistakes; the official description above is the record.