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CVE-2026-28793— Path Traversal Leading to Arbitrary File Read, Write and Delete 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之前版本存在路径遍历漏洞，该漏洞源于TinaCMS CLI开发服务器暴露的媒体端点存在路径遍历问题，可能导致攻击者读取和写入文件系统上预期媒体目录之外的任意文件。

CVSS 8.4 · High EPSS 0.21% · P11
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I. Basic Information for CVE-2026-28793

Vulnerability Information
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Vulnerability Title
Path Traversal Leading to Arbitrary File Read, Write and Delete 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 development server exposes media endpoints that are vulnerable to path traversal, allowing attackers to read and write arbitrary files on the filesystem outside the intended media directory. When running tinacms dev, the CLI starts a local HTTP server (default port 4001) exposing endpoints such as /media/list/*, /media/upload/*, and /media/*. These endpoints process user-controlled path segments using decodeURI() and path.join() without validating that the resolved path remains within the configured media directory. 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: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 路径遍历漏洞
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之前版本存在路径遍历漏洞，该漏洞源于TinaCMS CLI开发服务器暴露的媒体端点存在路径遍历问题，可能导致攻击者读取和写入文件系统上预期媒体目录之外的任意文件。
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-2026-28793

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III. Intelligence Information for CVE-2026-28793

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Vendor Advisories for CVE-2026-28793 (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-2026-24125 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-2026-28793

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