{"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":0.00222,"epssPercentile":0.1306,"aliases":["GHSA-rgr9-r7mj-mf6x"],"ecosystem":"npm","ingestedAt":"2026-08-19T22:45:54.185Z","slug":"CVE-2026-63123","body":"## Overview\n\nTina 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-63123)\n\nAffected packages:\n\n- `@tinacms/cli < 2.5.2`\n\nPatched in:\n\n- `@tinacms/cli 2.5.2`\n\nSource: https://github.com/advisories/GHSA-rgr9-r7mj-mf6x","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}