Missing Authorization in Open WebUI - CVE-2026-59217
Published: July 3, 2026
Vulnerability identifier: #VU136840
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59217
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify knowledge-base file membership.
The vulnerability exists due to improper access control in the upload auto-link path in file upload background processing when processing user-supplied upload metadata. A remote user can supply a crafted metadata.knowledge_id value during file upload to modify knowledge-base file membership.
The issue requires a verified account and a valid target knowledge-base ID. A user with read access but without write access to the target knowledge base can exploit it.
Affected software
Open WebUI
How to mitigate CVE-2026-59217
Install security update from vendor's website.
Open WebUI - update to 0.10.0