CVE-2026-28786 is an information disclosure vulnerability affecting Open WebUI versions prior to 0.8.6. An unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError`, revealing the server's absolute `DATA_DIR` path. Rated Medium with a CVSS score of 4.3, this flaw has a network attack vector and low attack complexity, requiring only low privileges to expose sensitive directory information. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability. Organizations using Open WebUI are advised to upgrade to version 0.8.6 to mitigate this risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.8.6CPE matchmatch criteria | cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
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