CVE-2026-91129— Home Assistant: mDNS Server-Side Request Forgery
Quick assessment
Affected
home-assistant core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| home-assistant | core | < 2026.2.3 |
affected |
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I. Basic Information for CVE-2026-91129
Vulnerability Information
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Vulnerability Title
Home Assistant: mDNS Server-Side Request Forgery
Source: CVE Program / CVE List V5
Vulnerability Description
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| home-assistant | core | < 2026.2.3 | - |
|
II. Public POCs for CVE-2026-91129
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-91129 (5)
-
https://github.com/home-assistant/core/pull/162941 x_refsource_MISC
-
https://github.com/home-assistant/core/releases/tag/2026.2.3 x_refsource_MISC
-
https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3 x_refsource_CONFIRM
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V. Comments for CVE-2026-91129
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