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CVE-2026-34603— @tinacms/graphql's Media Endpoints Can Escape the Media Root via Symlinks or Junctions

CVSS 7.1 · High EPSS 0.09% · P25
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I. Basic Information for CVE-2026-34603

Vulnerability Information
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Vulnerability Title
@tinacms/graphql's Media Endpoints Can Escape the Media Root via Symlinks or Junctions
Source: NVD (National Vulnerability Database)
Vulnerability Description
Tina is a headless content management system. Prior to version 2.2.2, @tinacms/cli recently added lexical path-traversal checks to the dev media routes, but the implementation still validates only the path string and does not resolve symlink or junction targets. If a link already exists under the media root, Tina accepts a path like pivot/written-from-media.txt as "inside" the media directory and then performs real filesystem operations through that link target. This allows out-of-root media listing and write access, and the same root cause also affects delete. This issue has been patched in version 2.2.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
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 2.2.2之前版本存在安全漏洞，该漏洞源于开发媒体路由中的路径遍历检查未解析符号链接目标，可能导致根目录外媒体列表和写入访问。
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

VendorProductAffected VersionsCPESubscribe
tinacmstinacms < 2.2.2 -

II. Public POCs for CVE-2026-34603

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Qwen3.6-35B-A3B · 8831 chars
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III. Intelligence Information for CVE-2026-34603

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Same Patch Batch · tinacms · 2026-04-01 · 3 CVEs total

CVE-2026-339498.1 HIGH@tinacms/graphql has Path Traversal that leads to overwrite of arbitrary files
CVE-2026-346047.1 HIGH@tinacms/graphql's `FilesystemBridge` Path Validation Can Be Bypassed via Symlinks or Junc

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-34603

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