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CVE-2026-64823: Home Assistant Core 0 to before 2026.5.4
CVE-2026-64823. CVSS 3.1 base score 4.7 (MEDIUM, Vendor/CNA). EPSS 0.00296 (percentile 0.21137), scored 24-Oct-2026.
Affected technology
Home Assistant Core · 0 to before 2026.5.4
home-assistant
Description’s affected range: before 2026.5.4
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · Active user interaction
What an attacker can do
Attackers can cause the media player proxy endpoint to serve attacker-controlled bytes with Content-Type text/html in the Home Assistant web origin, enabling theft of session tokens from local storage and authenticated calls to sensitive service endpoints including lock, alarm, and cover controls. Vendor/CNA’s CVSS 4.0 assessment (base score 2.1/10) rates confidentiality, integrity and availability impact as none.
- CWE
- CWE-79
- CCR priority
- 18.9 /100 (P5)
- CVSS 3.1
- 4.7 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N · Vendor/CNA
- EPSS
- 0.00296 · percentile 0.21137 · 2026-10-24
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-64823.html