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CVE-2026-29066— Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

Quick assessment

Affected
@tinacms cli
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TinaCMS是Tina开源的一个用于 Markdown、MDX 和 JSON 的开源无头 CMS。 TinaCMS 2.1.8之前版本存在安全漏洞，该漏洞源于TinaCMS CLI开发服务器配置Vite时禁用了内置的文件系统访问限制，可能导致未经身份验证的攻击者读取主机系统上的任意文件。

CVSS 6.2 · Medium EPSS 0.56% · P45

Public Exploits 1

Nuclei · 1 CVE-2026-29066.yaml [template]

Possible ATT&CK Techniques 1 AI

T1115 · Clipboard Data
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I. Basic Information for CVE-2026-29066

Vulnerability Information
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Vulnerability Title
Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对外部实体的文件或目录可访问
Source: CVE Program / CVE List V5
Vulnerability Title
TinaCMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TinaCMS是Tina开源的一个用于 Markdown、MDX 和 JSON 的开源无头 CMS。 TinaCMS 2.1.8之前版本存在安全漏洞，该漏洞源于TinaCMS CLI开发服务器配置Vite时禁用了内置的文件系统访问限制，可能导致未经身份验证的攻击者读取主机系统上的任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
@tinacms cli < 2.1.8 -

II. Public POCs for CVE-2026-29066

# POC Description Source Link Shenlong Link
1 TinaCMS CLI < 2.1.8 contains a file system read vulnerability caused by disabled Vite server.fs.strict setting, letting unauthenticated attackers read arbitrary files on the host system, exploit requires access to the dev server. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-29066.yaml POC Details
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III. Intelligence Information for CVE-2026-29066

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Vendor Advisories for CVE-2026-29066 (1)

Same Patch Batch · @tinacms · 2026-03-12 · 4 CVEs total

CVE-2026-28792 9.7 CRITICAL Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS
CVE-2026-28793 8.4 HIGH Path Traversal Leading to Arbitrary File Read, Write and Delete in TinaCMS
CVE-2026-24125 6.3 MEDIUM Path Traversal in @tinacms/graphql

IV. Related Vulnerabilities

Same product: cli
Same vendor: @tinacms
Same weakness: CWE-552

V. Comments for CVE-2026-29066

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