SSRF in Pavelzbornik Whisperx-Fastapi
CVE-2026-34981
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Pavelzbornik Whisperx-Fastapi — versions >= 0.3.1, < 0.6.0
- Pavelzbornik Whisperx Rest API
Weakness classification (CWE)
References
- github.com/pavelzbornik/whisperX-FastAPI/security/advisories/GHSA-6rc7-r867-c635 (Exploit, Third Party Advisory, Mitigation)
- github.com/pavelzbornik/whisperX-FastAPI/issues/256 (Patch, Issue Tracking)
- github.com/pavelzbornik/whisperX-FastAPI/commit/ef78fe2001deede5354031e4200d41c… (Patch)
Frequently asked questions
- What is CVE-2026-34981?
- CVE-2026-34981 is a medium-severity vulnerability in Pavelzbornik Whisperx-Fastapi, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-04-06.
- How severe is CVE-2026-34981?
- Medium severity. CVSS v3 base score is 5.8 out of 10.