{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33044", "tracking": { "current_release_date": "2026-04-01T05:39:48.428371Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33044", "initial_release_date": "2026-03-27T21:15:27.033872Z", "revision_history": [ { "date": "2026-03-27T21:15:27.033872Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-03-27T21:15:29.726007Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-27T21:27:13.489890Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (1).| CWES updated (1)." }, { "date": "2026-03-27T21:27:15.240793Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-27T21:35:07.539155Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-27T21:35:19.286804Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:40:42.328700Z", "number": "7", "summary": "References created (1)." }, { "date": "2026-03-28T07:43:20.428765Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-29T00:40:32.494693Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-31T14:25:22.506713Z", "number": "10", "summary": "CVSS created.| Products created (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-03-31T14:25:25.358094Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-31T14:39:15.038721Z", "number": "12", "summary": "Unknown change." }, { "date": "2026-03-31T16:25:17.978710Z", "number": "13", "summary": "Products created (1).| Product Identifiers created (1).| Products removed (1)." }, { "date": "2026-04-01T05:38:48.043346Z", "number": "14", "summary": "Unknown change." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=2020.02|<2026.1.0", "product": { "name": "vers:unknown/>=2020.02|<2026.1.0", "product_id": "CSAFPID-5969069", "product_identification_helper": { "cpe": "cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Home Assistant" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=2020.02|<2026.01", "product": { "name": "vers:unknown/>=2020.02|<2026.01", "product_id": "CSAFPID-5956159" } } ], "category": "product_name", "name": "core" } ], "category": "vendor", "name": "Home Assistant" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33044", "cwe": { "id": "CWE-79", "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" }, "notes": [ { "category": "description", "text": "### Summary\nAn 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 `` to strikethrough the text)\n\"image\"\n\nThis allows an authenticated user to execute JavaScript in the context of any other users accessing a dashboard.\n\n### Details\n\nThe vulnerability exists in the map-card by adding a malicious entity and having the property `hours_to_show` set.\nSee example below, with the malicious entity being `Pixel 9 Fold Robin {{7*7}}`:\nMap card with malicious device entity:\n\"image\"\n\nYAML-view of same card:\n\"image\"\n\n\nThis 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.\n\n\n### PoC\n1. Register a new sensor (or device) or change the name of an existing one, which provides a location\n2. Change the name to something malicious, for example `test `\nFor a new entity, it should work when setting the name. For old entities, go here:\n\"image\"\n\"image\"\n\"image\"\n
\n\"image\"\n\n3. Add the entity to a map card, which has the \"hours to show\"-attribute set, to display movement history\n\"image\"\n\"image\"\n\n\"image\"\n\n(The left arrow showing the custom setting, and the right arrow showing a data point which needs to be hovered)\n\n4. The payload executes when hovering a data-point (here shown with an \"alert(document.domain\"-payload)\n\"image\"\n\n### Impact\nThe 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.\n\nIn 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.\n\nSuggested criticality: **Medium**\n\nCredit: Robin Lunde - [https://robinlunde.com](https://robinlunde.com)", "title": "github - https://api.github.com/advisories/GHSA-r584-6283-p7xc" }, { "category": "description", "text": "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.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33044" }, { "category": "description", "text": "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.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33044.json" }, { "category": "other", "text": "0.00047", "title": "EPSS" }, { "category": "other", "text": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "title": "CVSSV4" }, { "category": "other", "text": "7.3", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.9", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS))", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is exploit data available from source Nvd, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5956159", "CSAFPID-5969069" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33044" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33044.json" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-r584-6283-p7xc" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/home-assistant/core/security/advisories/GHSA-r584-6283-p7xc" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-r584-6283-p7xc" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33044" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5956159", "CSAFPID-5969069" ] } ], "title": "CVE-2026-33044" } ] }