Quick answers
- Is CVE-2026-88618 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88618 being exploited in the wild.
- How severe is CVE-2026-88618?
- Medium severity, with a CVSS score of 6.5, published 15 September 2026.
- Which products and versions are affected?
- 1024-Lab SmartAdmin 3.30.0.
- Is there a fix for CVE-2026-88618?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-88618 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-88618?
- Check whether you run 1024-Lab SmartAdmin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is a stored cross-site scripting (XSS) flaw in the FileController.java upload() endpoint. An authenticated user can upload an HTML file (despite claiming to be an image via Content-Type header) containing embedded JavaScript. When the uploaded file is served from the application's origin, the browser executes the script in the security context of any user who opens it. The root cause is insufficient server-side validation of file content and type. An attacker needs valid authentication and file upload privileges, but no interaction from other users beyond viewing the file is required. Remediation involves validating file extensions and MIME types server-side, rejecting active HTML content, using server-generated file names, serving untrusted files from an isolated origin or as downloads with proper headers, and applying X-Content-Type-Options: nosniff.
Affected products
- 1024-lab SmartAdmin 3.30.0
Timeline
- 2026-09-15: disclosed