---
id: CVE-2026-108259
title: Tina is a headless content management system
summary: >-
  Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli
  reads Git branch values from VERCEL_GIT_COMMIT_REF, GITHUB_BRANCH, or HEAD,
  incorporates the raw value into the API URL, and interpolates that URL into
  JavaScript…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-94
vendor: tinacms
product: '@tinacms/cli'
affected:
  - '@tinacms/cli <= 2.7.0'
patched:
  - '@tinacms/cli 3.0.0'
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T21:17:04.017'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108259'
references:
  - url: >-
      https://github.com/tinacms/tinacms/commit/d030d414d39e15de79bf36e4c728d57205e71dde
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/pull/7526'
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/releases/tag/@tinacms/cli@3.0.0'
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/security/advisories/GHSA-pwhx-cvv3-qj5c'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-pwhx-cvv3-qj5c'
tags:
  - nvd
  - ghsa
  - npm
aliases:
  - GHSA-pwhx-cvv3-qj5c
ecosystem: npm
ingestedAt: '2026-10-09T21:12:42.322Z'
---

## Overview

Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli reads Git branch values from VERCEL_GIT_COMMIT_REF, GITHUB_BRANCH, or HEAD, incorporates the raw value into the API URL, and interpolates that URL into JavaScript string literals in packages/@tinacms/cli/src/next/codegen/index.ts and packages/@tinacms/cli/src/next/codegen/codegen/plugin.ts. A crafted Git-valid branch name containing a quote can terminate the generated string and inject an expression that executes when the generated client module is imported during a preview build. The injected code runs with the build process privileges and can read environment credentials, modify deployment artifacts, or make network requests. This issue is fixed in version 3.0.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-108259)

Affected packages:

- `@tinacms/cli <= 2.7.0`

Patched in:

- `@tinacms/cli 3.0.0`

Source: https://github.com/advisories/GHSA-pwhx-cvv3-qj5c