CVE-2026-59217CWE-862CWE-863

Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check (read-only users can add files to KB)

Medium · published July 9, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the file upload path accepted metadata.knowledge_id and auto-linked uploaded files to a target knowledge base without applying the write-access check used by /api/v1/knowledge//file/add, allowing read-only knowledge-base users to add arbitrary files. This issue is fixed in version 0.10.0.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00372 · 29.9th percentile
Weaknesses
CWE-862 · Missing Authorization; CWE-863 · Incorrect Authorization
Published
2026-07-09T16:51Z
EPSS history
Timeline
  • 09 JUL 16:51Z
    Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check (read-only users can add files to KB)
    cvelistv5