CVE-2026-100901 athlon1600 youtube-downloader stream.php stream server-side request forgery
Remote attackers can exploit a server-side request forgery vulnerability in the stream function to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100901?
CVE-2026-100901 is a medium-severity server-side request forgery vulnerability in athlon1600 youtube-downloader, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in athlon1600 youtube-downloader up to 4.0.1. Affected by this vulnerability is the function stream of the file public/stream.php. The manipulation of the argument url results in server-side request forgery. It is possible to launch the attack remotely. The exploit has been made public and could be used. Commit 6ffe823 'better security for public/stream.php' only added CURLOPT_PROTOCOLS http/https restriction and MAXREDIRS cap, does not restrict destination host. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-918
Which versions are affected by CVE-2026-100901?
How do I fix CVE-2026-100901?
No fix has been published for CVE-2026-100901 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-100901 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100901 exists.
Sources
Also known as GHSA-r276-5vww-gpvg.