{"apiVersion":"1.0","identifier":"CVE-2026-63123","description":"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.","publishedAt":"2026-08-19T22:16:58","lastModifiedAt":"2026-08-25T15:16:36","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63123","cvssScore":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","epssProbability":0.00193,"riskScore":0.66,"affectedProduct":"@tinacms/cli","affectedVersions":"<2.5.2","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-63123","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-63123","en":"https://www.redsauce.net/en/cves/CVE-2026-63123","fr":"https://www.redsauce.net/fr/cves/CVE-2026-63123","pt":"https://www.redsauce.net/pt/cves/CVE-2026-63123","de":"https://www.redsauce.net/de/cves/CVE-2026-63123","sk":"https://www.redsauce.net/sk/cves/CVE-2026-63123","el":"https://www.redsauce.net/el/cves/CVE-2026-63123"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-63123"}}