Medium
Security advisory
Home Assistant before 2021.1.3 does not have a protection layer that can help to prevent directory-traversal attacks against custom integrations. NOTE: the vendor's perspective is that the vulnerability itself is in custom integrations written by third parties, not in Home Assistant; however, Home Assistant does have a security update that is worthwhile in addressing this situation
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-3152
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:23 UTC · Revision 1
Source evidence
Home Assistant before 2021.1.3 does not have a protection layer that can help to prevent directory-traversal attacks against custom integrations. NOTE: the vendor's perspective is that the vulnerability itself is in custom integrations written by third parties, not in Home Assistant; however, Home Assistant does have a security update that is worthwhile in addressing this situation
osv:CVE-2021-3152
Complete source record
{
"id": "ddbe58242e059dc2fc9289ce1686412faffe04080b10212ed127b34482f9ac20",
"url": "https://osv.dev/vulnerability/CVE-2021-3152",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-3152",
"summary": "Home Assistant before 2021.1.3 does not have a protection layer that can help to prevent directory-traversal attacks against custom integrations. NOTE: the vendor's perspective is that the vulnerability itself is in custom integrations written by third parties, not in Home Assistant; however, Home Assistant does have a security update that is worthwhile in addressing this situation",
"evidence": "osv:CVE-2021-3152",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-3152",
"aliases": [
"CVE-2021-3152"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/home-assistant/core",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "b4268edd6acd47c160119bd56809e292d73eebf3"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2021.1.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"2021.1.2",
"2021.1.1",
"2021.1.0",
"2020.12.2",
"2020.12.1",
"2020.12.0",
"0.118.5",
"0.118.4",
"0.118.3",
"0.118.2",
"0.118.1",
"0.118.0",
"0.117.6",
"0.117.5",
"0.117.4",
"0.117.3",
"0.117.2",
"0.117.1",
"0.117.0",
"0.116.4",
"0.116.3",
"0.116.2",
"0.116.1",
"0.116.0",
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"0.115.5",
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"0.115.3",
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"0.115.1",
"0.115.0",
"0.114.4",
"0.114.3",
"0.114.2",
"0.114.1",
"0.114.0",
"0.113.3",
"0.113.2",
"0.113.1",
"0.113.0",
"0.112.5",
"0.112.4",
"0.112.3",
"0.112.2",
"0.112.1",
"0.112.0",
"0.111.4",
"0.111.3",
"0.111.2",
"0.111.1",
"0.111.0",
"0.110.7",
"0.110.6",
"0.110.5",
"0.110.4",
"0.110.3",
"0.110.2",
"0.110.1",
"0.110.0",
"0.109.6",
"0.109.5",
"0.109.4",
"0.109.3",
"0.109.2",
"0.109.1",
"0.109.0",
"0.108.9",
"0.108.8",
"0.108.7",
"0.108.6",
"0.108.5",
"0.108.4",
"0.108.3",
"0.108.2",
"0.108.1",
"0.108.0",
"0.107.7",
"0.107.6",
"0.107.5",
"0.107.4",
"0.107.3",
"0.107.2",
"0.107.1",
"0.107.0",
"0.106.6",
"0.106.5",
"0.106.4",
"0.106.3",
"0.106.2",
"0.106.1",
"0.106.0",
"0.105.5",
"0.105.4",
"0.105.3",
"0.105.2",
"0.105.1",
"0.105.0",
"0.104.3",
"0.104.2",
"0.104.1",
"0.104.0",
"0.103.6",
"0.103.5",
"0.103.4",
"0.103.3",
"0.103.2",
"0.103.1",
"0.103.0",
"0.103.0b1",
"0.103.0b0",
"0.81.1",
"0.28",
"0.7.6",
"Last-Python2-release"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3152.json"
}
}
],
"modified": "2026-10-24T10:30:18.158340412Z",
"provider": "osv",
"references": [
"https://www.home-assistant.io/blog/2021/01/14/security-bulletin/",
"https://www.home-assistant.io/blog/2021/01/22/security-disclosure/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:*"
],
"vendor_product": "home-assistant:home-assistant",
"extracted_events": [
{
"range": [
{
"fixed": "2021.1.3"
},
{
"fixed": "2021.1.3"
}
],
"source": "CPE_RANGE"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-3152",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429714,
"published_at": "2021-01-26T18:16:27.77+00:00"
}