What’s Vulnerable › Vulnerabilities

CVE-2026-40126: DOM-based Cross-Site Scripting in OutSystems Service Center

• Severity: medium (CVSS 4.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-17 · updated 2026-08-28
• Weakness: CWE-79

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

Affected products

• OutSystems Service Center: before 11.41.2 — fixed in 11.41.2

How to fix

Upgrade to a fixed version: OutSystems Service Center 11.41.2. Check the vendor advisory for mitigations.

References

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

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