CVE-2026-42099Public exploitNetwork attack vector

Authenticated code execution via temporary PHP file race

Published May 19, 2026 · Updated May 19, 2026

Race condition in Sparx Systems Pro Cloud Server 6.1 and earlier allows remote authenticated users to execute arbitrary PHP code. The WebEA /data_api/dl_internal_artifact.php endpoint writes an attacker-named file into its web-accessible directory and deletes it only after serving the response. Repository access and a delayed response are required; a parallel request can run the file in the web server process context.

CVSS severity7.7
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Sparx Systems Pro Cloud Server 6.1 and earlier allows remote authenticated users to execute arbitrary PHP code. The WebEA /data_api/dl_internal_artifact.php endpoint writes an attacker-named file into its web-accessible directory and deletes it only after serving the response. Repository access and a delayed response are required; a parallel request can run the file in the web server process context.

The record

CVE
CVE-2026-42099
Published
May 19, 2026
Updated
May 19, 2026
Vendor
Sparx Systems
Product
Pro Cloud Server
Classifications
CWE-362, CAPEC-26, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sparx Systems · Pro Cloud Serverversion=0 <=6.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7CERT.PLCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC-26Leveraging Race Conditions
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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