Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-w5g8-5849-vj76
No affected components available
Summary
NiceGUI's app.add_media_file() and app.add_media_files() media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and force the server to load entire files into memory at once.
With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service.
Impact
Affected applications: NiceGUI applications that serve media content via app.add_media_file() or app.add_media_files(), particularly those serving large files (video, audio).
What an attacker can do:
- Force the server to load entire files into memory instead of streaming them in chunks
- Amplify memory usage with concurrent requests to large media files
- Cause performance degradation, memory pressure, and potential OOM conditions
Attack difficulty: Low - requires only a crafted query parameter.
Remediation
Upgrade to a patched version of NiceGUI.
As a workaround, restrict access to media endpoints or strip unexpected query parameters at a reverse proxy layer.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard