A Denial of Service (DoS) vulnerability exists in open-webui/open-webui version 0.3.21. This vulnerability affects multiple endpoints, including `/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.

Rejected reason: ** REJECT ** DO NOT USE THIS CVE ID NUMBER. The Rejected CVE Record is a duplicate of CVE-2024-53981. Notes: All CVE users should reference CVE-2024-53981 instead of this CVE Record. All references and descriptions in this candidate have been removed to prevent accidental usage.

huntr.dev: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

huntr.dev: CWE-400

huntr.dev: https://huntr.com/bounties/9178f09e-4d4f-4a5b-bc32-cada7445b03c