Medium severity · published Oct 12, 2026
CVE-2026-109289
Open WebUI 0.8.8 before 0.11.4 Improper Session Revocation via Terminal WebSocket
6.3
CVSS
0.2%
EPSS
No
On KEV
Description
Open WebUI from 0.8.8 before 0.11.4 contains an improper authorization vulnerability that allows deactivated users to keep executing terminal commands through an already open terminal WebSocket. Because the terminal proxy route in terminals.py checks access only on the first message, deactivated users can keep running commands and reading or writing files on the terminal server.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
0.8.8 before 0.11.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109289
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109289
vendor-advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-6g45-8g27-fh8q
third-party-advisory
https://www.vulncheck.com/advisories/open-webui-0.8.8-before-0.11.4-improper-session-revocation-via-terminal-websocket
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