CVE-2026-109290 Open WebUI - Stored XSS

Open WebUI >0.11.1 <0.11.4 contains a stored cross-site scripting caused by crafted DOCX attachments in DocxPreview.svelte, letting authenticated attackers execute scripts to steal admin session tokens.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.26% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Upgrade to version 0.11.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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