CVE-2026-87995 Open WebUI - Stored XSS

Open WebUI 0.8.11 to 0.11.1 contains a stored XSS caused by rendering terminal port content in an iframe sandbox with allow-scripts and allow-same-origin, letting authenticated users with shared terminal access execute scripts and take over victim accounts, exploit requires victim to open the preview.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Required
EPSS
0.42% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to version 0.11.1 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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