CVE-2026-40126: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in OutSystems Service Center
OutSystems Service Center contains a DOM-based Cross-Site Scripting (XSS) vulnerability that allows a low-privileged attacker to execute JavaScript by uploading a file with a malicious filename. This vulnerability affects all locations where files can be attached and prepared for upload. The issue was fixed in version 11.41.2.
AI Analysis
Technical Summary
CVE-2026-40126 is a DOM-based Cross-Site Scripting (CWE-79) vulnerability in OutSystems Service Center. It arises from improper neutralization of input during web page generation, specifically when handling filenames of uploaded files. An attacker with low privileges can exploit this by uploading a file with a crafted filename containing JavaScript code, which is then executed in the context of the victim's browser. The vulnerability affects all file attachment locations within the product. The vendor fixed this issue in OutSystems Service Center version 11.41.2.
Potential Impact
Successful exploitation allows execution of arbitrary JavaScript in the context of the user's browser, potentially leading to session hijacking, unauthorized actions, or information disclosure. The attack requires low privileges and user interaction (uploading a malicious file). There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade to OutSystems Service Center version 11.41.2 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are indicated. Patch status is confirmed by the vendor advisory.
CVE-2026-40126: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in OutSystems Service Center
Description
OutSystems Service Center contains a DOM-based Cross-Site Scripting (XSS) vulnerability that allows a low-privileged attacker to execute JavaScript by uploading a file with a malicious filename. This vulnerability affects all locations where files can be attached and prepared for upload. The issue was fixed in version 11.41.2.
CVSS v4.0
Score 4.8medium
Affected software
OutSystems
Service Center
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40126 is a DOM-based Cross-Site Scripting (CWE-79) vulnerability in OutSystems Service Center. It arises from improper neutralization of input during web page generation, specifically when handling filenames of uploaded files. An attacker with low privileges can exploit this by uploading a file with a crafted filename containing JavaScript code, which is then executed in the context of the victim's browser. The vulnerability affects all file attachment locations within the product. The vendor fixed this issue in OutSystems Service Center version 11.41.2.
Potential Impact
Successful exploitation allows execution of arbitrary JavaScript in the context of the user's browser, potentially leading to session hijacking, unauthorized actions, or information disclosure. The attack requires low privileges and user interaction (uploading a malicious file). There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade to OutSystems Service Center version 11.41.2 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are indicated. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-04-09T10:15:00.973Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a82fa92bf8831d539d2785a
Added to database: 08/17/2026, 12:12:02 UTC
Last enriched: 08/24/2026, 13:32:34 UTC
Last updated: 10/01/2026, 14:51:06 UTC
Views: 78
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