Quick answers
- Is CVE-2026-52100 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-52100 being exploited in the wild.
- How severe is CVE-2026-52100?
- Informational severity, with a CVSS score of 7.5, published 14 July 2026.
- Which products and versions are affected?
- Andrei Marcu Linx-Server 1.0 - 2.3.8.
- Is there a fix for CVE-2026-52100?
- 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-2026-52100 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-52100?
- Check whether you run Andrei Marcu Linx-Server 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
The vulnerability exists in the 'uploadPutHandler' function within 'upload.go'. While the application implements a 'strictReferrerCheck' for POST-based uploads to prevent cross-origin attacks, this check is missing for PUT-based uploads. An attacker can bypass intended origin restrictions to upload or modify files. Although modern browser CORS preflight (OPTIONS) requirements may mitigate direct cross-origin exploitation in some browser contexts, the lack of server-side validation allows direct API interaction and exploitation in environments with relaxed CORS policies or via non-browser clients.
Affected products
- andreimarcu linx-server 1.0 - 2.3.8
Timeline
- 2026-07-14: advisory: CVE published by NVD/MITRE