---
id: CVE-2026-63123
title: Tina is a headless content management system
summary: >-
  Tina is a headless content management system. Prior to 2.5.2, the TinaCMS CLI
  package's Vite dev server packages/@tinacms/cli/src/next/vite/cors.ts origin
  callback returns false for a disallowed origin but does not reject the
  request, an…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'
cwe:
  - CWE-352
vendor: tinacms
product: '@tinacms/cli'
affected:
  - '@tinacms/cli < 2.5.2'
patched:
  - '@tinacms/cli 2.5.2'
published: '2026-08-19'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T21:18:16.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63123'
references:
  - url: >-
      https://github.com/tinacms/tinacms/commit/211997cdb53cbd43638bdee999faa65375cfc260
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/pull/7111'
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/releases/tag/@tinacms/cli@2.5.2'
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x'
    label: security-advisories@github.com
  - url: 'https://github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-rgr9-r7mj-mf6x'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00264
epssPercentile: 0.16274
aliases:
  - GHSA-rgr9-r7mj-mf6x
ecosystem: npm
ingestedAt: '2026-08-19T22:45:54.185Z'
---

## Overview

Tina is a headless content management system. Prior to 2.5.2, the TinaCMS CLI package's Vite dev server packages/@tinacms/cli/src/next/vite/cors.ts origin callback returns false for a disallowed origin but does not reject the request, and packages/@tinacms/cli/src/next/vite/plugins.ts still routes POST /media/upload/* to mediaRouter.handlePost. The upload code in packages/@tinacms/cli/src/next/commands/dev-command/server/media.ts writes attacker-controlled multipart contents inside the configured media root. A remote attacker can cause a developer's browser to submit this state-changing request by inducing the developer to visit an attacker-controlled page while tinacms dev is running. This issue is fixed in version 2.5.2.

## Remediation

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

## Package advisory (CVE-2026-63123)

Affected packages:

- `@tinacms/cli < 2.5.2`

Patched in:

- `@tinacms/cli 2.5.2`

Source: https://github.com/advisories/GHSA-rgr9-r7mj-mf6x