Is CVE-2026-109289 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109289 being exploited in the wild.

How severe is CVE-2026-109289?

Medium severity, with a CVSS score of 6.3, published 12 October 2026.

Which products and versions are affected?

Open WebUI 0.8.8 through 0.11.3.

Is there a fix for CVE-2026-109289?

Yes: fixed in 0.11.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-109289 attacked?

It is attacked over the network.

Am I affected by CVE-2026-109289?

Check whether you run Open WebUI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-109289: Open WebUI improper session revocation in terminal WebSocket

CVE-2026-109289 · Severity: medium · CVSS 6.3 · Published 2026-10-12

Open WebUI is a web interface for AI models that can connect to terminal servers for command execution. When an administrator deactivates a user account, the system fails to revoke access to terminal sessions that were already open, allowing deactivated users to continue running commands and accessing files on the terminal server indefinitely. This bypasses administrator access controls and prevents immediate removal of privileges.

Technologies: Open WebUI. Vendors: Open WebUI.

Quick answers

Is CVE-2026-109289 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109289 being exploited in the wild.
How severe is CVE-2026-109289?: Medium severity, with a CVSS score of 6.3, published 12 October 2026.
Which products and versions are affected?: Open WebUI 0.8.8 through 0.11.3.
Is there a fix for CVE-2026-109289?: Yes: fixed in 0.11.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109289 attacked?: It is attacked over the network.
Am I affected by CVE-2026-109289?: Check whether you run Open WebUI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 0.11.4

Technical details

The vulnerability is an insufficient session expiration flaw in the terminal WebSocket proxy route (/api/v1/terminals/{server_id}/api/terminals/{session_id}) in terminals.py. The proxy authenticates the user only on the first WebSocket message and never re-checks access on subsequent frames, so a deactivated user's open connection remains active and forwards all commands to the terminal server. The fix implements periodic re-validation of the user's token, role, and terminal access every ten seconds.

Affected products

open-webui Open WebUI 0.8.8 through 0.11.3

Timeline

2026-09-27: disclosed
2026-10-12: advisory

References

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