# CVE-2026-42100: DoS in Sparx Pro Cloud Server

> Attackers can cause a Denial of Service in Sparx Pro Cloud Server by sending specially crafted SQL queries, crashing the service.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **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:** 19 May 2026
- **Updated:** 19 May 2026
- **Also known as:** GHSA-r2pf-hp27-79jw

## What is CVE-2026-42100?

CVE-2026-42100 is a high-severity denial of service vulnerability in Sparx Systems Pro Cloud Server, published on 19 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper Handling of Syntactically Invalid Structure in Sparx Pro Cloud Server allows Denial of Service (DoS) attack to be executed by sending an specially crafted SQL query. This causes the Pro Cloud Server service to terminate unexpectedly. 

The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only version 6.1 (build 167) and below were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.

Weakness: CWE-228 (Improper Handling of Syntactically Invalid Structure)

## Which versions are affected by CVE-2026-42100?

It affects 1 product.


Products: Sparxsystems Pro Cloud Server.

## How do I fix CVE-2026-42100?

No fix has been published for CVE-2026-42100 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42100 being exploited?

There is no known exploitation of CVE-2026-42100 in the wild and no public exploit code.

## Other vulnerabilities in Sparx Systems Pro Cloud Server

- [CVE-2025-15625](https://insights.sbomify.com/CVE-2025-15625/): Unauthenticated execution of arbitrary SQL queries in Sparx Pro Cloud Server (critical 9.5)
- [CVE-2026-42097](https://insights.sbomify.com/CVE-2026-42097/): Authentication Bypass in Sparx Pro Cloud Server (critical 9.3)
- [CVE-2025-15623](https://insights.sbomify.com/CVE-2025-15623/): Sparx Pro Cloud Server reveals sensitive information to an unauthenticated user (critical 9.3)
- [CVE-2025-15624](https://insights.sbomify.com/CVE-2025-15624/): Plaintext Storage of a Password in Sparx Pro Cloud Server. (critical 9.3)
- [CVE-2026-42096](https://insights.sbomify.com/CVE-2026-42096/): Broken Access Control in Sparx Pro Cloud Server (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42100 and fix it if it is affected.

What it is: CVE-2026-42100 is a high-severity denial of service vulnerability in Sparx Systems Pro Cloud Server, published on 19 May 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-2026-42100 in the wild and no public exploit code.

Affected product: Sparx Systems Pro Cloud Server. 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-2026-42100/ (Markdown: https://insights.sbomify.com/CVE-2026-42100/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42100
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42100
- OSV: https://osv.dev/vulnerability/CVE-2026-42100

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42100/
Summaries are generated and may contain mistakes; the official description above is the record.