Open WebUI from 0.8.8 before 0.11.4 contains an improper authorization vulnerability that allows deactivated users to keep executing terminal… (CVE-2026-109289)
Description
Open WebUI versions from 0.8.8 up to but not including 0.11.4 have an improper authorization vulnerability. This flaw allows users who have been deactivated to continue executing terminal commands via an already open terminal WebSocket connection. The vulnerability exists because the terminal proxy route only verifies access on the first message, enabling continued unauthorized command execution and file access.
CVSS v3.1
Score 6.3medium
Affected software
pkg:github/open-webui/open-webuiRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Open WebUI versions 0.8.8 before 0.11.4 contain an improper authorization vulnerability (CVE-2026-109289) where deactivated users can maintain execution of terminal commands through an already established terminal WebSocket. The terminal proxy route in terminals.py performs access checks only on the initial message, allowing continued command execution and file operations by users who should no longer have access.
Potential Impact
Deactivated users can continue to execute terminal commands and read or write files on the terminal server via an existing WebSocket connection. This can lead to unauthorized information disclosure, integrity violations, and availability impacts on the terminal server.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid leaving terminal WebSocket sessions open for deactivated users and consider terminating existing sessions upon user deactivation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-wqjg-w22m-7835
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-109289"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6acd554b2cdf04f656da84d3
Added to database: 10/12/2026, 21:46:51 UTC
Last enriched: 10/12/2026, 21:54:33 UTC
Last updated: 10/13/2026, 03:28:26 UTC
Views: 2
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