Medium
Local-only webhooks externally accessible via SniTun in Home Assistant Core
Type: advisorySources: OSV
Home assistant is an open source home automation. The assessment verified that webhooks available in the webhook component are triggerable via the `*.ui.nabu.casa` URL without authentication, even when the webhook is marked as Only accessible from the local network. This issue is facilitated by the SniTun proxy, which sets the source address to 127.0.0.1 on all requests sent to the public URL and forwarded to the local Home Assistant. This issue has been addressed in version 2023.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2023-41894
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 01:24 UTC · Revision 1
Source evidence
Local-only webhooks externally accessible via SniTun in Home Assistant Core
core-osv · Original sourcePublished 19 Oct 2023, 23:23 UTC
Home assistant is an open source home automation. The assessment verified that webhooks available in the webhook component are triggerable via the `*.ui.nabu.casa` URL without authentication, even when the webhook is marked as Only accessible from the local network. This issue is facilitated by the SniTun proxy, which sets the source address to 127.0.0.1 on all requests sent to the public URL and forwarded to the local Home Assistant. This issue has been addressed in version 2023.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
osv:CVE-2023-41894
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2023-41894",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Local-only webhooks externally accessible via SniTun in Home Assistant Core",
"summary": "Home assistant is an open source home automation. The assessment verified that webhooks available in the webhook component are triggerable via the `*.ui.nabu.casa` URL without authentication, even when the webhook is marked as Only accessible from the local network. This issue is facilitated by the SniTun proxy, which sets the source address to 127.0.0.1 on all requests sent to the public URL and forwarded to the local Home Assistant. This issue has been addressed in version 2023.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.",
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"modified": "2026-10-28T02:30:24.908010032Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/41xxx/CVE-2023-41894.json",
"https://github.com/home-assistant/core/security/advisories/GHSA-wx3j-3v2j-rf45",
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"https://www.home-assistant.io/blog/2023/10/19/security-audits-of-home-assistant/"
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"source_id": "core-osv",
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"published_at": "2023-10-19T23:23:17.909+00:00"
}