Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-bfg3-zqc3-wuem
Vulnerability ID VCID-bfg3-zqc3-wuem
Aliases CVE-2026-33044
GHSA-r584-6283-p7xc
Summary Home Assistant has stored XSS in Map-card through malicious device name ### Summary 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 (The lines or the dots representing that device's movement, as shown in the screenshot below, with the example showing a html-injection using `<s>` to strikethrough the text) <img width="348" height="355" alt="image" src="https://github.com/user-attachments/assets/1af3ef33-3a72-4816-8ade-e6405aace176" /> This allows an authenticated user to execute JavaScript in the context of any other users accessing a dashboard. ### Details The vulnerability exists in the map-card by adding a malicious entity and having the property `hours_to_show` set. See example below, with the malicious entity being `Pixel 9 <s> Fold Robin {{7*7}}`: Map card with malicious device entity: <img width="338" height="332" alt="image" src="https://github.com/user-attachments/assets/15229cc3-1b69-438c-9ee5-cbfa9483aec9" /> YAML-view of same card: <img width="338" height="198" alt="image" src="https://github.com/user-attachments/assets/cd579266-75c3-4cdf-9d08-1544a6887feb" /> This issue largely resembles the issue documented in: [CVE-2025-62172](https://github.com/home-assistant/core/security/advisories/GHSA-mq77-rv97-285m), but with an entity which can be displayed in a Map, instead of in an energy-dashboard. ### PoC 1. Register a new sensor (or device) or change the name of an existing one, which provides a location 2. Change the name to something malicious, for example `test <img src=x onerror=alert(document.domain) />` For a new entity, it should work when setting the name. For old entities, go here: <img width="1300" height="411" alt="image" src="https://github.com/user-attachments/assets/d240549e-f26c-4617-89d7-5480451ae5a3" /> <img width="1383" height="885" alt="image" src="https://github.com/user-attachments/assets/94db6186-ad54-476c-92a3-9f6870b0c862" /> <img width="387" height="436" alt="image" src="https://github.com/user-attachments/assets/f4c4b9f6-b1e7-4b50-9012-3be31c617be4" /> <br> <img width="392" height="515" alt="image" src="https://github.com/user-attachments/assets/a0f24d2f-cc18-4ef7-9071-40376dbb38c1" /> 3. Add the entity to a map card, which has the "hours to show"-attribute set, to display movement history <img width="296" height="383" alt="image" src="https://github.com/user-attachments/assets/b2db55b6-3d4b-4ab0-91fe-fc26813ad5ff" /> <img width="692" height="410" alt="image" src="https://github.com/user-attachments/assets/aec15e07-12c0-4abf-ba73-979736131c7c" /> <img width="694" height="302" alt="image" src="https://github.com/user-attachments/assets/e4bb7cac-fe85-41eb-963c-1743e78d937c" /> (The left arrow showing the custom setting, and the right arrow showing a data point which needs to be hovered) 4. The payload executes when hovering a data-point (here shown with an "alert(document.domain"-payload) <img width="504" height="118" alt="image" src="https://github.com/user-attachments/assets/9f24e1fe-949f-4fa5-9e4f-781828a1343b" /> ### Impact The impact of this vulnerability is that a user can target other users of the system and perform account takeover through client side exploitation of XSS. In the context of this system, I believe the vulnerability to be less impactful than the CVSS metric describes, as it requires a specific setup (map-card with attribute `hours_to_show` set, as this brings up the trail). It is interesting to note that any user who sets this attribute, will be highly likely to trigger the vulnerability through normal use. It also has no potential for being imported through seemingly innocent integrations and can only be set explicitly by another invited user, a device name, a cloud service or through social engineering. Other devices which has the same sensor can trigger the same vulnerability, and I expect there to exists cloud-based devices that would enable a threat actor to deliver the payload remotely. Suggested criticality: **Medium** Credit: Robin Lunde - [https://robinlunde.com](https://robinlunde.com)
Status Published
Exploitability 0.5
Weighted Severity 6.6
Risk 3.3
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-33044
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-33044
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-33044
cvssv3.1_qr LOW https://github.com/advisories/GHSA-r584-6283-p7xc
cvssv4 1.1 https://github.com/home-assistant/core
generic_textual LOW https://github.com/home-assistant/core
cvssv3.1_qr LOW https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
cvssv4 1.1 https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
cvssv4 7.3 https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
generic_textual LOW https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
ssvc Track* https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
cvssv4 1.1 https://nvd.nist.gov/vuln/detail/CVE-2026-33044
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2026-33044
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-33044
https://github.com/home-assistant/core
https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
https://nvd.nist.gov/vuln/detail/CVE-2026-33044
GHSA-r584-6283-p7xc https://github.com/advisories/GHSA-r584-6283-p7xc
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P Found at https://github.com/home-assistant/core
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P Found at https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
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 Found at https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-04-01T03:55:26Z/ Found at https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P Found at https://nvd.nist.gov/vuln/detail/CVE-2026-33044
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.06268
EPSS Score 0.00021
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:59:07.542810+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-r584-6283-p7xc/GHSA-r584-6283-p7xc.json 38.6.0