Quick answers
- Is CVE-2026-54337 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-54337 being exploited in the wild.
- How severe is CVE-2026-54337?
- Critical severity, with a CVSS score of 9.8, published 15 September 2026.
- Which products and versions are affected?
- Fireshare Fireshare < 1.6.14.
- Is there a fix for CVE-2026-54337?
- A patch was published on 2026-06-04: Version 1.6.14 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-54337 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-54337?
- 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 vulnerability is an argument injection (CWE-88) in the video upload API endpoint. The vulnerable code path is: user-supplied filename and folder parameters are insufficiently sanitized (spaces are retained), then passed unsanitized to a shell command that invokes ffprobe via string splitting. An attacker can craft a filename with shell metacharacters and arguments (e.g., `-o data`) that are interpreted as ffprobe command-line flags, allowing arbitrary file writes. The attack requires only network access and no authentication. The fix was released in version 1.6.14.
Affected products
- Fireshare Fireshare < 1.6.14
Timeline
- 2026-06-04: disclosed
- 2026-06-04: patched: Version 1.6.14