{
"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-2026-29066",
"tracking": {
"current_release_date": "2026-03-23T03:21:21.448720Z",
"generator": {
"date": "2026-02-17T15:00:00Z",
"engine": {
"name": "V.E.L.M.A",
"version": "1.7"
}
},
"id": "CVE-2026-29066",
"initial_release_date": "2026-03-12T17:26:33.121791Z",
"revision_history": [
{
"date": "2026-03-12T17:26:33.121791Z",
"number": "1",
"summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-12T17:26:41.232665Z",
"number": "2",
"summary": "NCSC Score created."
},
{
"date": "2026-03-12T17:38:46.661312Z",
"number": "3",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)."
},
{
"date": "2026-03-12T17:38:48.539691Z",
"number": "4",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-12T20:46:35.930592Z",
"number": "5",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
},
{
"date": "2026-03-12T20:46:43.158714Z",
"number": "6",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-13T14:15:29.849636Z",
"number": "7",
"summary": "Source created.| CVE status created. (valid)| EPSS created."
},
{
"date": "2026-03-13T14:15:31.094128Z",
"number": "8",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-13T16:39:29.884097Z",
"number": "9",
"summary": "Unknown change."
},
{
"date": "2026-03-13T20:27:20.619448Z",
"number": "10",
"summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)."
},
{
"date": "2026-03-13T20:27:30.348013Z",
"number": "11",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-19T15:28:51.745818Z",
"number": "12",
"summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)."
},
{
"date": "2026-03-19T15:28:55.551014Z",
"number": "13",
"summary": "NCSC Score updated."
},
{
"date": "2026-03-20T09:35:45.925948Z",
"number": "14",
"summary": "Source connected.| CVE status created. (valid)| EPSS created."
}
],
"status": "interim",
"version": "14"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<2.1.8",
"product": {
"name": "vers:unknown/<2.1.8",
"product_id": "CSAFPID-5810529"
}
}
],
"category": "product_name",
"name": "cli"
}
],
"category": "vendor",
"name": "@tinacms"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:unknown/<2.1.8",
"product": {
"name": "vers:unknown/<2.1.8",
"product_id": "CSAFPID-5825717",
"product_identification_helper": {
"cpe": "cpe:2.3:a:ssw:tinacms\\/cli:*:*:*:*:*:node.js:*:*"
}
}
}
],
"category": "product_name",
"name": "tinacms\\/cli"
}
],
"category": "vendor",
"name": "ssw"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-29066",
"cwe": {
"id": "CWE-552",
"name": "Files or Directories Accessible to External Parties"
},
"notes": [
{
"category": "description",
"text": "Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI dev server configures Vite with server.fs.strict: false, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system. This vulnerability is fixed in 2.1.8.",
"title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-29066"
},
{
"category": "description",
"text": "Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI dev server configures Vite with server.fs.strict: false, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system. This vulnerability is fixed in 2.1.8.",
"title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-29066"
},
{
"category": "description",
"text": "## Summary\nThe TinaCMS CLI dev server configures Vite with `server.fs.strict: false`, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system\n\n## Details\nWhen running `tinacms dev`, the CLI starts a Vite dev server configured in:\n`packages/@tinacms/cli/src/next/vite/index.ts`\n```\nserver: {\n host: configManager.config?.build?.host ?? false,\n ...\n fs: {\n strict: false, // Disables Vite's filesystem access restriction\n },\n},\n```\nTinaCMS middleware only intercepts specific route prefixes (/media/*, /graphql, /altair, /searchIndex). Any request to a path outside these routes falls through to Vite's default static file handler, which will serve the file directly from the absolute path on the filesystem.\nAdditionally, the server enables permissive CORS (cors() with no origin restriction), which may further facilitate browser-based exploitation such as DNS rebinding attacks.\n\n## PoC\n\n**Prerequisites**: TinaCMS CLI dev server running (default port 4001).\n\n- Read system files directly:\n```\ncurl http://localhost:4001/etc/passwd\n```\n![\"image\"](\"https://github.com/user-attachments/assets/6fd0e1c7-a549-40c8-bc81-af9c343f52a0\")
\n\n```\ncurl http://localhost:4001/etc/hostname\n```\n![\"image\"](\"https://github.com/user-attachments/assets/bd103dc3-d4c3-4774-8007-b55de3fc2a9e\")
\nVite resolves and serves the absolute path directly from the filesystem.\n\n\n## Impact\nAny developer running tinacms dev in an environment where the dev server port is reachable by an attacker. This includes:\n\n- Cloud IDEs (GitHub Codespaces, Gitpod) where ports are automatically forwarded and publicly accessible\n\n- Docker or VM setups with port forwarding configured\n\n- Misconfigured environments binding to 0.0.0.0 via the build.host config option\n\n- Systems targeted via DNS rebinding attacks, leveraging the unrestricted CORS policy\n\n- Local environments with malicious dependencies running on the same machine\n\nAn attacker who can reach port 4001 can:\n\n- Read any file readable by the server process (/etc/passwd, /etc/shadow, SSH private keys)\n\n- Exfiltrate environment variables and secrets via /proc/self/environ\n\n- Access cloud credentials and API keys from configuration files",
"title": "github - https://github.com/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"category": "description",
"text": "## Summary\nThe TinaCMS CLI dev server configures Vite with `server.fs.strict: false`, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system\n\n## Details\nWhen running `tinacms dev`, the CLI starts a Vite dev server configured in:\n`packages/@tinacms/cli/src/next/vite/index.ts`\n```\nserver: {\n host: configManager.config?.build?.host ?? false,\n ...\n fs: {\n strict: false, // Disables Vite's filesystem access restriction\n },\n},\n```\nTinaCMS middleware only intercepts specific route prefixes (/media/*, /graphql, /altair, /searchIndex). Any request to a path outside these routes falls through to Vite's default static file handler, which will serve the file directly from the absolute path on the filesystem.\nAdditionally, the server enables permissive CORS (cors() with no origin restriction), which may further facilitate browser-based exploitation such as DNS rebinding attacks.\n\n## PoC\n\n**Prerequisites**: TinaCMS CLI dev server running (default port 4001).\n\n- Read system files directly:\n```\ncurl http://localhost:4001/etc/passwd\n```\n\n\n```\ncurl http://localhost:4001/etc/hostname\n```\n\nVite resolves and serves the absolute path directly from the filesystem.\n\n\n## Impact\nAny developer running tinacms dev in an environment where the dev server port is reachable by an attacker. This includes:\n\n- Cloud IDEs (GitHub Codespaces, Gitpod) where ports are automatically forwarded and publicly accessible\n\n- Docker or VM setups with port forwarding configured\n\n- Misconfigured environments binding to 0.0.0.0 via the build.host config option\n\n- Systems targeted via DNS rebinding attacks, leveraging the unrestricted CORS policy\n\n- Local environments with malicious dependencies running on the same machine\n\nAn attacker who can reach port 4001 can:\n\n- Read any file readable by the server process (/etc/passwd, /etc/shadow, SSH private keys)\n\n- Exfiltrate environment variables and secrets via /proc/self/environ\n\n- Access cloud credentials and API keys from configuration files",
"title": "github - https://api.github.com/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"category": "other",
"text": "0.00024",
"title": "EPSS"
},
{
"category": "other",
"text": "3.6",
"title": "NCSC Score"
},
{
"category": "other",
"text": "The value of the most recent EPSS score, There is exploit data available from source Nvd, Is related to (a version of) an uncommon product, Exploit code publicly available",
"title": "NCSC Score top decreasing factors"
}
],
"product_status": {
"known_affected": [
"CSAFPID-5810529",
"CSAFPID-5825717"
]
},
"references": [
{
"category": "external",
"summary": "Source - nvd",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29066"
},
{
"category": "external",
"summary": "Source raw - nvd",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-29066"
},
{
"category": "external",
"summary": "Source - cveprojectv5",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-29066"
},
{
"category": "external",
"summary": "Source raw - cveprojectv5",
"url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/29xxx/CVE-2026-29066.json"
},
{
"category": "external",
"summary": "Source - github",
"url": "https://github.com/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"category": "external",
"summary": "Source raw - github",
"url": "https://api.github.com/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"category": "external",
"summary": "Source - first",
"url": "https://api.first.org/data/v1/epss?cve=CVE-2026-29066"
},
{
"category": "external",
"summary": "Source raw - first",
"url": "https://api.first.org/data/v1/epss?limit=10000&offset=0"
},
{
"category": "external",
"summary": "Source - github",
"url": "https://api.github.com/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"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/tinacms/tinacms/security/advisories/GHSA-m48g-4wr2-j2h6"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29066"
},
{
"category": "external",
"summary": "Reference - github",
"url": "https://github.com/advisories/GHSA-m48g-4wr2-j2h6"
}
],
"scores": [
{
"cvss_v3": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"baseScore": 6.2,
"baseSeverity": "MEDIUM"
},
"products": [
"CSAFPID-5810529",
"CSAFPID-5825717"
]
}
],
"title": "CVE-2026-29066"
}
]
}