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

> Attackers can bypass path validation via symlinks to read, modify, or delete files outside the intended content root in TinaCMS.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Apr 2026
- **Updated:** 1 Apr 2026
- **Also known as:** GHSA-g9c2-gf25-3x67

## What is CVE-2026-34604?

CVE-2026-34604 is a high-severity path traversal vulnerability in tinacms, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-59 (Improper Link Resolution Before File Access), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-34604?

2 open source packages ship an affected version, including @tinacms/graphql. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@tinacms/graphql` | npm | All versions | 2.2.2 |
| `@tinacms/graphql` | npm | All versions | 2.2.2 |

Products: Ssw Tinacms\/Graphql.

## How do I fix CVE-2026-34604?

Upgrade @tinacms/graphql to 2.2.2 or later.

## Is CVE-2026-34604 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34604 exists.

## Other vulnerabilities in tinacms

- [CVE-2026-33949](https://insights.sbomify.com/CVE-2026-33949/): @tinacms/graphql has Path Traversal that leads to overwrite of arbitrary files (high 8.1)
- [CVE-2026-24125](https://insights.sbomify.com/CVE-2026-24125/): Path Traversal in @tinacms/graphql (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34604 and fix it if it is affected.

What it is: CVE-2026-34604 is a high-severity path traversal vulnerability in tinacms, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34604 exists.

Affected packages and fixed versions:
- @tinacms/graphql (npm): affected all versions; fixed in 2.2.2
- @tinacms/graphql (npm): affected all versions; fixed in 2.2.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-34604/ (Markdown: https://insights.sbomify.com/CVE-2026-34604/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34604
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34604
- OSV: https://osv.dev/vulnerability/CVE-2026-34604

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34604/
Summaries are generated and may contain mistakes; the official description above is the record.