CVE-2026-40126

DOM-based Cross-Site Scripting in OutSystems Service Center

State: Published
Severity: 4.8 Medium
Published: Aug 17, 2026
Updated: Aug 17, 2026
Reserved: Apr 9, 2026

Description

OutSystems Service Center is vulnerable to a DOM-based Cross-Site Scripting (XSS) attack that can be exploited by a low-privileged attacker via the upload of a file with a malicious filename containing JavaScript code. The vulnerability exists in all locations where a file can be attached and prepared for upload to the server.

This issue was fixed in OutSystems Service Center version 11.41.2

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	CERT-PL

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
Service CenterOutSystems	before 11.41.2Affected

References

https://cert.pl/en/posts/2026/08/CVE-2026-40126/third-party-advisory
https://www.outsystems.com/downloads/ScreenDetails?ReleaseId=22953&MajorVersion=11&ComponentName=LifeTimeproduct
https://success.outsystems.com/support/security/vulnerabilities/vulnerability_rpm_6669/vendor-advisory

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