CVE-2026-70486

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-70486
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70486.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-70486
Aliases
Published
2026-08-04T20:01:55Z
Modified
2026-10-21T02:30:32Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin
Details

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user with access to a configured terminal server could cause script in a previewed file to run in the Open WebUI origin, read the victim's session token from localStorage, and take over the account, with possible server-side code execution if the victim was an admin or held workspace.functions. This issue is fixed in 0.11.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-1021",
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70486.json"
}
References

Affected packages

Git / github.com/open-webui/open-webui

Affected ranges

Type
GIT
Repo
https://github.com/open-webui/open-webui
Events
Introduced
f31768e20e5c6b4f6da0ef657877298b359936cf
Fixed
f9590b8017199e56d5e953657e6498e3cef1d246
Fixed
65a5fad7b97db99d490d81f4e0860282c3a4543c
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0.9.0"
                },
                {
                    "fixed":  "0.11.0"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "65a5fad7b97db99d490d81f4e0860282c3a4543c"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v0.11.0",
            "range":  [
                {
                    "fixed":  "f9590b8017199e56d5e953657e6498e3cef1d246"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.10.0
v0.10.1
v0.10.2
v0.9.0
v0.9.1
v0.9.2
v0.9.3
v0.9.4
v0.9.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70486.json"