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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-45303",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-11T20:14:43.202Z",
"datePublished": "2026-05-15T21:21:43.000Z",
"dateUpdated": "2026-05-19T12:24:47.582Z"
},
"containers": {
"cna": {
"title": "Open WebUI: Stored XSS via the HTML renedering view",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"lang": "en",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-4vrc-m9ch-6m3r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-4vrc-m9ch-6m3r"
}
],
"affected": [
{
"vendor": "open-webui",
"product": "open-webui",
"versions": [
{
"version": "< 0.6.5",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-05-15T21:21:43.000Z"
},
"descriptions": [
{
"lang": "en",
"value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.5, through the HTML rendering view, scripts can be injected and executed. The frontend provides a function to visualize the HTML content of a current chat. The content is embedded in an iFrame with the allow-scripts allow-forms allow-same-origin sandbox directive. This means that the content is placed in a sandbox but with permission to execute scripts and access the parent’s data (e.g., local storage). As a result, only a few functions are restricted (e.g., displaying an alert box), but in effect, the sandbox attribute is largely nullified. This vulnerability is fixed in 0.6.5."
}
],
"source": {
"advisory": "GHSA-4vrc-m9ch-6m3r",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-4vrc-m9ch-6m3r",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-05-19T12:24:29.494325Z",
"id": "CVE-2026-45303",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-05-19T12:24:47.582Z"
}
}
]
}
}