CVE-2026-34981Public exploitNetwork attack vector

Unauthenticated internal access via unchecked URL fetch

Published Apr 6, 2026 · Updated Apr 6, 2026

SSRF in Pavel Zbornik whisperX-FastAPI 0.3.1 through 0.5.0 allows remote attackers to read internal resources via a supplied audio URL. FileService.download_from_url() passes the /speech-to-text-url endpoint's user-supplied URL to requests.get() before checking its extension and without validating the scheme, host, or resolved address. The endpoint requires no authentication; a crafted .mp3 path therefore reaches cloud metadata or internal services and returns their response data.

CVSS severity5.8
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Pavel Zbornik whisperX-FastAPI 0.3.1 through 0.5.0 allows remote attackers to read internal resources via a supplied audio URL. FileService.download_from_url() passes the /speech-to-text-url endpoint's user-supplied URL to requests.get() before checking its extension and without validating the scheme, host, or resolved address. The endpoint requires no authentication; a crafted .mp3 path therefore reaches cloud metadata or internal services and returns their response data.

The record

CVE
CVE-2026-34981
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Pavel Zbornik
Product
whisperX-FastAPI
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.3.1, < 0.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pavel Zbornik · whisperX-FastAPIversion=>= 0.3.1, < 0.6.0

Published CVSS scores

5.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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