Auth bypass in Sparx Systems Pro Cloud Server
CVE-2026-42097
Sparx Pro Cloud Server requires authentication based on requested URL. An attacker can omit the "model" query parameter and send the model name only in the binary blob in POST request allowing SQL query execution without authentication. 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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: -0.000
Affected products
Weakness classification (CWE)
References
- cert.pl/en/posts/2026/05/CVE-2026-42096 (Third Party Advisory, third-party-advisory)
- sparxsystems.com/products/procloudserver/ (Product, product)
- sploit.tech/2026/05/19/Sparx-Enterprise-Architect-PCS.html (Exploit, technical-description, Third Party Advisory)
- efigo.pl/blog/CVE-2026-42096/ (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-42097?
- CVE-2026-42097 is a high-severity vulnerability in Sparx Systems Pro Cloud Server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-05-19.
- How severe is CVE-2026-42097?
- High severity. CVSS v3 base score is 8.8 out of 10.