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CVE-2026-40126 is a DOM-based cross-site scripting vulnerability in OutSystems Service Center affecting versions prior to 11.41.2. The flaw can be exploited by a low-privileged attacker through the upload workflow by supplying a file whose filename contains malicious JavaScript code. The vulnerable condition exists in locations where a file can be attached and prepared for upload to the server, indicating that untrusted filename data is incorporated into client-side page logic or rendering without proper neutralization. Successful exploitation results in attacker-controlled script execution in the browser context of a user interacting with the affected interface.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A DOM-based cross-site scripting vulnerability affecting OutSystems Service Center software.
A DOM-based cross-site scripting vulnerability in OutSystems Service Center that allows a low-privileged attacker to inject JavaScript via a malicious filename during file upload workflows.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.