Missing Authorization in Open WebUI - CVE-2026-45667
Published: May 12, 2026
Vulnerability identifier: #VU131113
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45667
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service and incur usage costs.
The vulnerability exists due to missing authorization in the /api/v1/memories/ef endpoint when handling unauthenticated GET requests that invoke the embedding function. A remote attacker can send repeated requests to trigger embedding generation to cause a denial of service and incur usage costs.
Only instances with memory features enabled are vulnerable, and cost exposure occurs when a paid upstream embedding provider is configured.
Affected software
Open WebUI
How to mitigate CVE-2026-45667
Install security update from vendor's website.
Open WebUI - update to 0.8.0