Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M

CVE-2026-33044Home Assistant has stored XSS in Map-card through malicious device name

High 7.3

In plain English

A high-severity cross-site scripting in core from home-assistant. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.3High

Exploit odds (30 days)0.2%top 86.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Home Assistant is open source home automation software that puts local control and privacy first. Starting in version 2020.02 and prior to version 2026.01, an authenticated party can add a malicious name to their device entity, allowing for Cross-Site Scripting attacks against anyone who can see a dashboard with a Map-card which includes that entity. It requires that the victim hovers over an information point. Version 2026.01 fixes the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	homeassistant	2026.01	GHSA-r584-6283-p7xc
PyPI	homeassistant	2026.01	PYSEC-2026-2517

Affected products (as reported)

Vendor	Product	Versions
home-assistant	core	>= 2020.02, < 2026.01

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

References

https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc x_refsource_CONFIRM