Vulnerability · Published May 19, 2026 · Assigned by CERT-PL

CVE-2026-42097Authentication Bypass in Sparx Pro Cloud Server

Critical 9.3

In plain English

A critical-severity authorization bypass via user-controlled key in Pro Cloud Server from Sparx Systems. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.9%top 38.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Sparx Systems	Pro Cloud Server	0 – through 6.1

Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

References

https://cert.pl/en/posts/2026/05/CVE-2026-42096 third-party-advisory
https://sparxsystems.com/products/procloudserver/ product
https://sploit.tech/2026/05/19/Sparx-Enterprise-Architect-PCS.html technical-description
https://efigo.pl/blog/CVE-2026-42096/ third-party-advisory