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vuln-cve/data/2026/64xxx/CVE-2026-64823.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-64823",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-07-20T18:27:48.160Z",
"datePublished": "2026-07-21T15:16:03.790Z",
"dateUpdated": "2026-11-08T14:07:59.946Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-11-08T14:07:59.946Z"
},
"datePublic": "2026-05-20T00:00:00.000Z",
"title": "Home Assistant Core < 2026.5.4 XSS via Shelly media_player.py thumb URI",
"descriptions": [
{
"lang": "en",
"value": "Home Assistant Core before 2026.5.4 contains a cross-site scripting vulnerability in the Shelly integration's async_get_media_image() method that allows attackers controlling a Shelly device's thumb field to serve arbitrary HTML content by supplying a data URI with a text/html content type without validation against an image-only allowlist. Attackers can cause the media player proxy endpoint to serve attacker-controlled bytes with Content-Type text/html in the Home Assistant web origin, enabling theft of session tokens from local storage and authenticated calls to sensitive service endpoints including lock, alarm, and cover controls."
}
],
"tags": [
"x_open-source"
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"type": "CWE"
}
]
}
],
"affected": [
{
"defaultStatus": "affected",
"vendor": "home-assistant",
"product": "Home Assistant Core",
"packageURL": "pkg:github/home-assistant/core",
"repo": "https://github.com/home-assistant/core",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThan": "2026.5.4"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2026.5.4"
}
]
}
]
}
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"metrics": [
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"scenarios": [
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"lang": "en",
"value": "GENERAL"
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],
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "ACTIVE",
"vulnConfidentialityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"subIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "LOW",
"baseScore": 2.1,
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
}
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"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "CHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "NONE",
"version": "3.1",
"baseSeverity": "MEDIUM",
"baseScore": 4.7,
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
}
],
"references": [
{
"url": "https://github.com/home-assistant/core/releases/tag/2026.5.4",
"name": "Home Assistant Core 2026.5.4 Release Notes",
"tags": [
"release-notes"
]
},
{
"url": "https://github.com/home-assistant/core/pull/171585",
"name": "Pull Request",
"tags": [
"issue-tracking",
"patch"
]
},
{
"url": "https://github.com/home-assistant/core/commit/894a68acb678afc382fe5ea9002e61ab7f862011",
"name": "Patch Commit",
"tags": [
"patch"
]
},
{
"url": "https://www.vulncheck.com/advisories/home-assistant-core-xss-via-shelly-media-player-py-thumb-uri",
"tags": [
"third-party-advisory"
]
}
],
"credits": [
{
"lang": "en",
"value": "Harish Kolla (@Har1sh-k)",
"type": "finder"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "vulncheck"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-22T14:12:03.484754Z",
"id": "CVE-2026-64823",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-22T14:12:16.922Z"
}
}
]
}
}