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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.

TinaCMS是Tina组织开源的一个内容管理系统。 TinaCMS 23.0.4之前版本存在授权问题漏洞，该漏洞源于媒体适配器将攻击者控制的对象键（如req.query.key、req.query.media）传递给存储SDK上传和删除操作，且未强制执行配置的mediaRoot，可能导致已认证的CMS编辑器在存储凭据可访问范围内创建或删除任意对象。

CVSS 5.4 · Medium EPSS 0.38% · P30

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
Vulnerability Title
TinaCMS 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TinaCMS是Tina组织开源的一个内容管理系统。 TinaCMS 23.0.4之前版本存在授权问题漏洞，该漏洞源于媒体适配器将攻击者控制的对象键（如req.query.key、req.query.media）传递给存储SDK上传和删除操作，且未强制执行配置的mediaRoot，可能导致已认证的CMS编辑器在存储凭据可访问范围内创建或删除任意对象。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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