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CVE-2026-28792— Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS

Quick assessment

Affected
@tinacms cli
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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开发服务器配置了宽松的CORS策略，结合路径遍历漏洞，可能导致远程攻击者通过恶意网站枚举、写入和删除开发者机器上的任意文件。

CVSS 9.7 · Critical EPSS 0.63% · P48
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I. Basic Information for CVE-2026-28792

Vulnerability Information
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Vulnerability Title
Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS
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 combines a permissive CORS configuration (Access-Control-Allow-Origin: *) with the path traversal vulnerability (previously reported) to enable a browser-based drive-by attack. A remote attacker can enumerate the filesystem, write arbitrary files, and delete arbitrary files on developer's machines by simply tricking them into visiting a malicious website while tinacms dev is running. This vulnerability is fixed in 2.1.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
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开发服务器配置了宽松的CORS策略，结合路径遍历漏洞，可能导致远程攻击者通过恶意网站枚举、写入和删除开发者机器上的任意文件。
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)

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Affected Products

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

II. Public POCs for CVE-2026-28792

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III. Intelligence Information for CVE-2026-28792

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Vendor Advisories for CVE-2026-28792 (1)

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

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
CVE-2026-29066 6.2 MEDIUM Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

IV. Related Vulnerabilities

Same product: cli
Same vendor: @tinacms
Same weakness: CWE-22

V. Comments for CVE-2026-28792

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