Cyber Resilience

CVE-2026-42097

CriticalPublic PoCUpdated

Published: 19 May 2026

Published
19 May 2026
Modified
02 June 2026
KEV Added
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Patch
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CVSS Score v4 9.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0094 56.4th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-42097 is a critical-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Sparxsystems Pro Cloud Server. Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 43.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Auth bypass on public-facing Sparx Pro Cloud Server directly enables exploitation via crafted POST requests to run unauthorized SQL queries.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-41471Shared CWE-639
CVE-2023-36331Shared CWE-639
CVE-2026-33297Shared CWE-639
CVE-2026-41084Shared CWE-639
CVE-2024-50685Shared CWE-639
CVE-2019-25235Shared CWE-639
CVE-2026-28469Shared CWE-639
CVE-2026-33511Shared CWE-639
CVE-2026-40600Shared CWE-639
CVE-2026-5396Shared CWE-639

Affected Assets

sparxsystems
pro cloud server
≤ 6.1.167

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References