# CVE-2026-29066: Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

> Unauthenticated attackers can read arbitrary files on the host system via the TinaCMS CLI dev server due to disabled filesystem restrictions.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Mar 2026
- **Updated:** 13 Mar 2026
- **Also known as:** GHSA-m48g-4wr2-j2h6

## What is CVE-2026-29066?

CVE-2026-29066 is a medium-severity path traversal vulnerability in @tinacms cli, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI dev server configures Vite with server.fs.strict: false, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system. This vulnerability is fixed in 2.1.8.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-29066?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@tinacms/cli` | npm | All versions | 2.1.8 |
| `@tinacms/cli` | npm | All versions | 2.1.8 |

Products: Ssw Tinacms\/Cli.

## How do I fix CVE-2026-29066?

Upgrade @tinacms/cli to 2.1.8 or later.

## Is CVE-2026-29066 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29066 exists.

Public exploit code:

- TinaCMS - Path Traversal (nuclei): http/cves/2026/CVE-2026-29066.yaml

## Other vulnerabilities in @tinacms cli

- [CVE-2026-28792](https://insights.sbomify.com/CVE-2026-28792/): Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS (critical 9.7)
- [CVE-2023-25164](https://insights.sbomify.com/CVE-2023-25164/): Sensitive Information leak via Script File in TinaCMS (high 8.6)
- [CVE-2026-28793](https://insights.sbomify.com/CVE-2026-28793/): Path Traversal Leading to Arbitrary File Read, Write and Delete in TinaCMS (high 8.4)
- [CVE-2024-45391](https://insights.sbomify.com/CVE-2024-45391/): Tina search token leak via lock file in TinaCMS (high 7.5)
- [CVE-2026-28791](https://insights.sbomify.com/CVE-2026-28791/): Path Traversal in Media Upload Handle in Tina (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-29066 and fix it if it is affected.

What it is: CVE-2026-29066 is a medium-severity path traversal vulnerability in @tinacms cli, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29066 exists.

Affected packages and fixed versions:
- @tinacms/cli (npm): affected all versions; fixed in 2.1.8
- @tinacms/cli (npm): affected all versions; fixed in 2.1.8

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-2026-29066/ (Markdown: https://insights.sbomify.com/CVE-2026-29066/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-29066
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-29066
- OSV: https://osv.dev/vulnerability/CVE-2026-29066

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-29066/
Summaries are generated and may contain mistakes; the official description above is the record.