{"cve":"CVE-2026-63123","nvd":{"published":"2026-08-19T22:16:58.710","modified":"2026-10-26T10:10:00.140","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-352"],"references":["https://github.com/tinacms/tinacms/commit/211997cdb53cbd43638bdee999faa65375cfc260","https://github.com/tinacms/tinacms/pull/7111","https://github.com/tinacms/tinacms/releases/tag/@tinacms/cli@2.5.2","https://github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x","https://github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x"],"products":[],"source":"nvd","synced_at":"2026-10-26T10:28:23.151169805+00:00"},"epss":{"cve":"CVE-2026-63123","score":0.00264,"percentile":0.18171,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-rgr9-r7mj-mf6x","url":"https://osv.dev/vulnerability/GHSA-rgr9-r7mj-mf6x","summary":"Tina: Cross-origin `POST /media/upload/*` requests can write arbitrary files into the Tina dev server media root","modified":"2026-08-21T18:45:12.880231633Z","packages":[{"ecosystem":"npm","name":"@tinacms/cli","purl":"pkg:npm/%40tinacms/cli","ranges":["<2.5.2"],"fixed":["2.5.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}