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CVE-2026-59992— Tina: Broken Access Control: arbitrary bucket-key write/delete in `next-tinacms-s3` (and sibling production media adapters)

Quick assessment

Affected
tinacms tinacms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tina 是一个无头内容管理系统。在 next-tinacms-s3 23.0.4、next-tinacms-dos 23.0.4、next-tinacms-azure 14.0.4 以及 next-tinacms-cloudinary 26.0.4 版本之前，Tina 的官方生产媒体适配器未强制实施操作者配置媒体根目录（mediaRoot），直接将攻击者控制的对象键（object keys）传递给存储 SDK 的上传和删除操作。 具体而言，在 文件中， 函数接受 作为签名 PutObject URL 的输入，而

CVSS 5.4 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1136.003 · Cloud Account

Affected Version Matrix 5

VendorProduct Version RangeStatus
tinacms next-tinacms-azure < 14.0.4 affected
tinacms next-tinacms-cloudinary < 26.0.4 affected
tinacms next-tinacms-dos < 23.0.4 affected
tinacms next-tinacms-s3 < 23.0.4 affected
tinacms tinacms < 23.0.4 affected
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I. Basic Information for CVE-2026-59992

Vulnerability Information
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Vulnerability Title
Tina: Broken Access Control: arbitrary bucket-key write/delete in `next-tinacms-s3` (and sibling production media adapters)
Source: CVE Program / CVE List V5
Vulnerability Description
Tina is a headless content management system. Prior to next-tinacms-s3 23.0.4, next-tinacms-dos 23.0.4, next-tinacms-azure 14.0.4, and next-tinacms-cloudinary 26.0.4, the first-party production media adapters pass attacker-controlled object keys to storage SDK upload and delete operations without enforcing the operator's configured mediaRoot. In packages/next-tinacms-s3/src/handlers.ts, createMediaHandler accepts req.query.key for a signed PutObject URL and the DELETE path uses req.query.media as the DeleteObjectCommand key. The same missing key-boundary check exists in packages/next-tinacms-dos/src/handlers.ts, packages/next-tinacms-azure/src/handlers.ts, and packages/next-tinacms-cloudinary/src/handlers.ts. An authenticated CMS editor can therefore create or delete objects anywhere the deployment's storage credential can reach, including other tenants' or non-media objects. These issues are fixed in next-tinacms-s3 23.0.4, next-tinacms-dos 23.0.4, next-tinacms-azure 14.0.4, and next-tinacms-cloudinary 26.0.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tinacms tinacms < 23.0.4 -
tinacms next-tinacms-s3 < 23.0.4 -
tinacms next-tinacms-dos < 23.0.4 -
tinacms next-tinacms-azure < 14.0.4 -
tinacms next-tinacms-cloudinary < 26.0.4 -

II. Public POCs for CVE-2026-59992

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III. Intelligence Information for CVE-2026-59992

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Patches & Fixes for CVE-2026-59992 (2)

Vendor Advisories for CVE-2026-59992 (1)

IV. Related Vulnerabilities

Same product: tinacms
Same vendor: tinacms
Same weakness: CWE-639

V. Comments for CVE-2026-59992

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