GHSA-5ccf-884p-4jjq Open WebUI Unauthenticated Multipart Boundary Denial of Service (DoS) Vulnerability
Unauthenticated attackers can cause denial of service in Open WebUI by sending crafted multipart requests that exhaust server resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GHSA-5ccf-884p-4jjq?
GHSA-5ccf-884p-4jjq is a denial of service vulnerability in open-webui, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
/ollama/models/upload, /audio/api/v1/transcriptions, and /rag/api/v1/doc. The application processes multipart boundaries without authentication, leading to resource exhaustion. By appending additional characters to the multipart boundary, an attacker can cause the server to parse each byte of the boundary, ultimately leading to service unavailability. This vulnerability can be exploited remotely, resulting in high CPU and memory usage, and rendering the service inaccessible to legitimate users.Which versions are affected by GHSA-5ccf-884p-4jjq?
4 open source packages ship an affected version, including open-webui.
| Package | Affected | Fixed in |
|---|---|---|
open-webui PyPI | All versions to 0.3.21 | None |
open-webui PyPI | All versions to 0.3.21 | None |
open-webui npm | All versions to 0.3.21 | None |
open-webui npm | All versions to 0.3.21 | None |
How do I fix GHSA-5ccf-884p-4jjq?
No fix has been published for GHSA-5ccf-884p-4jjq yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GHSA-5ccf-884p-4jjq being exploited?
There is no known exploitation of GHSA-5ccf-884p-4jjq in the wild and no public exploit code.