CVE-2026-100391 MediaFlow Proxy through 2.4.9 Server-Side Request Forgery via Incomplete Validation
Remote attackers can exploit incomplete validation in MediaFlow Proxy to read internal resources and cloud metadata via Server-Side Request Forgery.
- 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-2026-100391?
CVE-2026-100391 is a high-severity server-side request forgery vulnerability in mhdzumair mediaflow-proxy, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MediaFlow Proxy through 2.4.9 contains a server-side request forgery vulnerability in the /proxy routes due to missing and incomplete destination validation in the d query parameter. Remote attackers can supply arbitrary internal URLs including loopback and cloud metadata endpoints to read full responses from the proxy server.
Weakness: CWE-918
Which versions are affected by CVE-2026-100391?
How do I fix CVE-2026-100391?
No fix has been published for CVE-2026-100391 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-2026-100391 being exploited?
There is no known exploitation of CVE-2026-100391 in the wild and no public exploit code.
Sources
Also known as GHSA-5j62-5j8p-jpqh.