Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M
CVE-2026-34981whisperX REST API: SSRF in download_from_url() — URL validation happens after HTTP request, extension bypass via .mp3
Medium 5.8
In plain English
A medium-severity server-side request forgery in whisperX-FastAPI from pavelzbornik. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Official description
The whisperX API is a tool for enhancing and analyzing audio content. From 0.3.1 to 0.5.0, FileService.download_from_url() in app/services/file_service.py calls requests.get(url) with zero URL validation. The file extension check occurs AFTER the HTTP request is already made, and can be bypassed by appending .mp3 to any internal URL. The /speech-to-text-url endpoint is unauthenticated. This vulnerability is fixed in 0.6.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pavelzbornik | whisperX-FastAPI | >= 0.3.1, < 0.6.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N