---
title: "CVE-2026-100391: MediaFlow Proxy - Server-Side Request Forgery"
description: "MediaFlow Proxy <= 2.4.9 contains a server-side request forgery caused by missing and incomplete destination validation in the /proxy routes' d query parameter, letting remote attackers read arbitrary internal URLs including loopback and cloud metadata endpoints."
url: https://panop.io/threat-heartbeat/CVE-2026-100391/
---

# CVE-2026-100391 MediaFlow Proxy - Server-Side Request Forgery

MediaFlow Proxy <= 2.4.9 contains a server-side request forgery caused by missing and incomplete destination validation in the /proxy routes' d query parameter, letting remote attackers read arbitrary internal URLs including loopback and cloud metadata endpoints.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100391)

## Details

Type

Server-Side Request Forgery

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-918](https://cwe.mitre.org/data/definitions/918.html)

## Vendor fix

Update to the latest version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100391](https://nvd.nist.gov/vuln/detail/CVE-2026-100391)
- [https://github.com/mhdzumair/mediaflow-proxy/blob/2.4.9/mediaflow\_proxy/routes/proxy.py#L532-L569](https://github.com/mhdzumair/mediaflow-proxy/blob/2.4.9/mediaflow_proxy/routes/proxy.py#L532-L569)
- [https://github.com/mhdzumair/mediaflow-proxy/commit/99f4af1153d4766420a098a232183cba1efdc560](https://github.com/mhdzumair/mediaflow-proxy/commit/99f4af1153d4766420a098a232183cba1efdc560)
- [https://www.vulncheck.com/advisories/mediaflow-proxy-through-2.4.9-server-side-request-forgery-via-incomplete-validation](https://www.vulncheck.com/advisories/mediaflow-proxy-through-2.4.9-server-side-request-forgery-via-incomplete-validation)
- [https://github.com/mhdzumair/mediaflow-proxy](https://github.com/mhdzumair/mediaflow-proxy)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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