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CVE-2026-28786
4.3 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): LOW
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): LOW
- Integrity impact (I): NONE
- Availability impact (A): NONE
Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions`
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError` whose message — including the server's absolute `DATA_DIR` path — is returned verbatim in the HTTP 400 response body, confirming information disclosure on all default deployments. Version 0.8.6 patches the issue.
References
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https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h x_refsource_CONFIRM
Affected products
open-webui
- ==< 0.8.6
Package maintainers
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@drupol Pol Dellaiera <pol.dellaiera@protonmail.com>
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@shivaraj-bh Shivaraj B H <sbh69840@gmail.com>