High severity · published Jul 9, 2026
CVE-2026-59224
Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the upstream (X-User-Id header and ws_terminal session_id query injection)
8.0
CVSS
0.4%
EPSS
No
On KEV
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, backend/open_webui/routers/terminals.py built the ws_terminal upstream URL from an unencoded session_id and appended user_id as a query parameter, allowing query injection to make the terminal backend resolve another user identity; the HTTP proxy path also forwarded X-User-Id as an integrity-unbound identity claim. This issue is fixed in version 0.10.0.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
< 0.10.0 · source: vendor
OW
Open Webui · Openwebui
before 0.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59224
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59224
Patch
https://github.com/open-webui/open-webui/commit/5f3a628a8d291bb5d33e1a0b0c89fb62a2927934
Issue Tracking
https://github.com/open-webui/open-webui/pull/26042
Product
https://github.com/open-webui/open-webui/releases/tag/v0.10.0
Mitigation
https://github.com/open-webui/open-webui/security/advisories/GHSA-j657-m4c4-24jq
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