# CVE-2026-54074: @tinacms/cli: Remote Code Execution in @tinacms/cli via Forestry migration — unsanitised __TINA_INTERNAL__ marker in user-controlled YAML labels

> Attackers can inject arbitrary JavaScript into generated files via unsanitized YAML labels, leading to code execution when developers run the CLI.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 1 Jul 2026
- **Updated:** 2 Jul 2026
- **Also known as:** GHSA-4936-9hrh-qqpw

## What is CVE-2026-54074?

CVE-2026-54074 is a high-severity code injection vulnerability in tinacms, published on 1 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Tina is a headless content management system. @tinacms/cli versions prior to 2.4.3 contain a Remote Code Execution vulnerability in the Forestry-to-Tina migration command. The internal helper addVariablesToCode unquotes any value matching the marker "__TINA_INTERNAL__:::(.*?):::" inside the stringified collection JSON. User-supplied label and name fields from .forestry/**/*.yml are placed into that JSON without any sanitisation. An attacker who controls a Forestry-style project can therefore inject arbitrary JavaScript into the generated tina/templates.{ts,js} file. The injected code is written at module top level, so it executes the moment the developer runs tinacms dev or tinacms build, with the developer's privileges. This issue has been fixed in version 2.4.3.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-54074?

2 open source packages ship an affected version, including @tinacms/cli.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@tinacms/cli` | npm | All versions | 2.4.3 |
| `@tinacms/cli` | npm | All versions | 2.4.3 |

## How do I fix CVE-2026-54074?

Upgrade @tinacms/cli to 2.4.3 or later.

## Is CVE-2026-54074 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54074 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54074 and fix it if it is affected.

What it is: CVE-2026-54074 is a high-severity code injection vulnerability in tinacms, published on 1 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54074 exists.

Affected packages and fixed versions:
- @tinacms/cli (npm): affected all versions; fixed in 2.4.3
- @tinacms/cli (npm): affected all versions; fixed in 2.4.3

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-2026-54074/ (Markdown: https://insights.sbomify.com/CVE-2026-54074/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54074
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54074
- OSV: https://osv.dev/vulnerability/CVE-2026-54074

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54074/
Summaries are generated and may contain mistakes; the official description above is the record.