Quick answers
- Is CVE-2026-75327 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-75327 being exploited in the wild.
- How severe is CVE-2026-75327?
- Critical severity, with a CVSS score of 9.8, published 26 August 2026.
- Which products and versions are affected?
- DocSys DocSys V2.02.85.
- Is there a fix for CVE-2026-75327?
- 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-2026-75327 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-75327?
- Check whether anything you run is named in the advisory. 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 uploadMarkdownPic endpoint in DocController.java (lines 2019-2024) accepts user-supplied imgName and file parameters without validation. The imgName parameter is directly used as a filename (lines 2081-2088) and combined with a path without sanitization, allowing directory traversal sequences (e.g., ../../../../../../../../tmp/). No authentication is required. An attacker can upload arbitrary files with controlled names to arbitrary filesystem locations, such as web-accessible directories, leading to remote code execution. The vulnerability affects DocSys-master V2.02.85 and potentially later versions.
Affected products
- DocSys DocSys V2.02.85
Timeline
- 2026-08-26: disclosed