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CVE-2026-64825

Home Assistant Core before 2026.6.0 contains a path traversal vulnerability that allows unauthenticated attackers to write arbitrary files to any directory on the host filesystem by uploading a crafted backup archive during the initial onboarding window. Attackers can manipulate the 'name' field inside the uploaded archive's backup.json to supply an absolute path, causing pathlib.Path.__truediv__ to discard the configured backup directory prefix and write attacker-controlled content to arbitrary
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0085faaa82a49c8c2a964e1cb06af2877e5b3387e1567283426a1759c9cdfb99
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/home-assistant/core","product":"Home Assistant Core","repo":"https://github.com/home-assistant/core","vendor":"home-assistant","versions":[{"lessThan":"2026.6.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/references/2
{"name":"Pull Request","tags":["issue-tracking"],"url":"https://github.com/home-assistant/core/pull/172368"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/references/1
{"name":"Release Notes","tags":["release-notes"],"url":"https://github.com/home-assistant/core/releases/tag/2026.6.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:185eb02a1c1f571460a36078c3770f4bd326ec4a3dcff4682a65fd10e6c085a7 · sha256:5fd4d65a93ceb34e… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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