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[GHSA-cwh8-w64c-4j5h] Home Assistant Core before 2026.7.0 contains a path... #8781

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[GHSA-cwh8-w64c-4j5h] Home Assistant Core before 2026.7.0 contains a path... #8781

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31 changes: 24 additions & 7 deletions advisories/unreviewed/2026/07/GHSA-cwh8-w64c-4j5h/GHSA-cwh8-w64c-4j5h.json
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Original file line number Diff line number Diff line change
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{
"schema_version": "1.4.0",
"id": "GHSA-cwh8-w64c-4j5h",
"modified": "2026-07-21T18:31:02Z",
"modified": "2026-07-21T18:31:10Z",
"published": "2026-07-21T18:31:01Z",
"aliases": [
"CVE-2026-64824"
],
"summary": "homeassistant: Symlink path traversal RCE via backup-restore",
"details": "Home Assistant Core before 2026.7.0 contains a path traversal vulnerability in the backup-restore function that allows attackers to write files to arbitrary absolute filesystem paths by supplying a crafted tar archive with a SYMTYPE entry containing a benign member name paired with an absolute linkname pointing outside the extraction directory. Because the official Docker image runs the Home Assistant process as root and the subsequent regular-file entry is written through the unvalidated symlink, attackers can achieve remote code execution by overwriting auto-imported Python paths such as site-packages/sitecustomize.py or custom component directories.",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
Comment on lines 13 to +14
}
],
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "homeassistant"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.7.0"
}
]
}
]
}
],
"affected": [],
"references": [
{
"type": "WEB",
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