CVE-2026-45402
- Source
- https://cve.org/CVERecord?id=CVE-2026-45402
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45402.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-45402
- Aliases
- Published
- 2026-05-15T20:40:04.617Z
- Modified
- 2026-07-08T08:05:17.019819570Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge-Base Attach Endpoints
- Details
-
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, multiple endpoints accept a user-supplied fileid and attach the referenced file to a resource the caller controls (folder knowledge, knowledge-base contents) without verifying that the caller owns or has been granted access to the file. The file's content then becomes reachable through the downstream RAG / file-content paths, allowing any authenticated user to exfiltrate any other user's private file — and on the knowledge-base path, also to overwrite it — given knowledge of the file's UUID. This affects backend/openwebui/routers/folders.py (POST /api/v1/folders/{id}/update), backend/openwebui/routers/knowledge.py (addfiletoknowledgebyid), and backend/openwebui/routers/knowledge.py (addfilestoknowledgebyid_batch). This vulnerability is fixed in 0.9.5.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45402.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-639" ] }- References
Affected packages
Git / github.com/open-webui/open-webui
Affected ranges
- Type
- GIT
- Repo
- https://github.com/open-webui/open-webui
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "cpe": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "0.9.5" } ], "source": [ "AFFECTED_FIELD", "CPE_RANGE" ] }