Server-Side Request Forgery in Athlon1600 YouTube-Downloader
CVE-2026-100901

6.9MEDIUM

Key Information:

Vendor

Athlon1600

Status
Youtube-downloader
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100901?

A vulnerability exists in the Athlon1600 YouTube-Downloader, specifically in the stream function of public/stream.php. This weakness allows an attacker to manipulate the url argument, which could lead to unauthorized server-side requests. The issue can be exploited remotely, putting servers at risk. Despite attempts to inform the vendor about this security flaw, there has been no acknowledgment or response. Recent modifications to the code, aimed at improving security, only implemented restrictions for HTTP/HTTPS protocols and limited redirection, without addressing the ability to control the destination host.

Affected Version(s)

youtube-downloader 4.0.0

youtube-downloader 4.0.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-100901 - Proof of Concept

References

https://vuldb.com/vuln/410851
vdb-entrytechnical-description
https://vuldb.com/vuln/410851/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-100901
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

qianqiu (VulDB User)
VulDB CNA Team
.