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TI-2026-61898 Aliases CVE-2026-91129GHSA-4ghv-53cq-7wp3

Home Assistant: mDNS Server-Side Request Forgery

Priority MEDIUM 58CWE-918Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00294 22nd percentileScored 2026-11-07
Fix Fixed core (home-assistant): 2026.2.3homeassistant (PyPI): 2026.2.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
home-assistantcorebefore 2026.2.32026.2.3Patch availableCNA
—homeassistant (PyPI)before 2026.2.32026.2.3Patch availableGHSA-4ghv-53cq-7wp3
  • core Vendorhome-assistant Affected before 2026.2.3 Fixed in 2026.2.3 Patch available CNA
  • homeassistant (PyPI) Vendor— Affected before 2026.2.3 Fixed in 2026.2.3 Patch available GHSA-4ghv-53cq-7wp3

Remediation

  • Fix · CNA core (home-assistant) Fixed in 2026.2.3
  • Fix · GHSA-4ghv-53cq-7wp3 homeassistant (PyPI) Fixed in 2026.2.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91129
  2. 2026-10-03 Alias added: GHSA-4ghv-53cq-7wp3

References

Other 6

  • TI-2023-12210 Improper authentication in home-assistant core CVSS 3.1CRITICAL 10.0
  • TI-2021-22555 Home Assistant Community Store 1.10.0 Path Traversal Account Takeover CVSS 4.0HIGH 8.7
  • TI-2026-61899 Home Assistant: XSS in Statistics Graph Card CVSS 4.0CRITICAL 9.3
  • TI-2026-46349 Home Assistant Core < 2026.7.0 Symlink Path Traversal RCE via backup-restore CVSS 4.0CRITICAL 9.3
  • TI-2026-40307 Cleartext transmission of sensitive information in home-assistant core CVSS 3.1HIGH 7.5
  • TI-2025-38490 Home Assistant vulnerable to Stored XSS in Energy dashboard from Energy Entity Name CVSS 4.0HIGH 8.5
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences