Tina: Cross-origin `POST /media/upload/*` requests can write arbitrary files into the Tina dev server media root

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63123
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 22:16:58 UTC
Updated2026-08-19 22:16:58 UTC
DescriptionTina 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS: 0.001960000 probability, percentile 0.096480000 (date 2026-08-20)

Problem Types: CWE-352 | CWE-352 CWE-352: Cross-Site Request Forgery (CSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tinacms Tinacms affected < 2.5.2 Not specified

References

ReferenceSourceLinkTags
github.com/tinacms/tinacms/pull/7111 [email protected] github.com
github.com/tinacms/tinacms/commit/211997cdb53cbd43638bdee999faa65375cfc260 [email protected] github.com
github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x [email protected] github.com
github.com/tinacms/tinacms/releases/tag/@tinacms/[email protected] [email protected] github.com
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