CVE-2026-54007

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Source
https://cve.org/CVERecord?id=CVE-2026-54007
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54007.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54007
Aliases
Published
2026-06-23T16:51:27.546Z
Modified
2026-07-08T08:13:47.843812217Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Open WebUI: Cross-origin postMessage confirmation bypass via action:submit
Details

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt() in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized POST /api/v1/chats/new and POST /api/chat/completions requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent. This vulnerability is fixed in 0.9.6.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54007.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-346"
    ]
}
References

Affected packages

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

Affected ranges

Type
GIT
Repo
https://github.com/open-webui/open-webui
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1a97751e376e00a1897bc3679215ae1c7bd8fd42
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.9.6"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54007.json"