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CVE-2026-58200— @jhb.software/payload-cloudinary-plugin: Arbitrary Cloudinary API Parameter Signing

Quick assessment

Affected
jhb-software payload-plugins
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.

Payload 插件集合是一套旨在增强 Payload CMS 功能的插件。在 0.3.0 到 0.4.0 版本中，启用了 clientUploads 的 @jhb.software/payload-cloudinary-plugin 部署暴露了 端点。该端点的处理程序（位于 ）将攻击者可控的 直接传递给 ，且未实施键名白名单、集合策略、时间戳新鲜度检查或指定文件夹强制约束。任何经过身份验证的 Payload 用户都可以获取针对未授权参数（如 、 、 、 、 和 ）的有效 Cloudinary HMAC-SHA1

CVSS 7.1 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
jhb-software payload-plugins >= 0.3.0, < 0.4.0 affected
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I. Basic Information for CVE-2026-58200

Vulnerability Information
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Vulnerability Title
@jhb.software/payload-cloudinary-plugin: Arbitrary Cloudinary API Parameter Signing
Source: CVE Program / CVE List V5
Vulnerability Description
Payload Plugins is a collection of plugins designed to enhance Payload CMS. From 0.3.0 until 0.4.0, @jhb.software/payload-cloudinary-plugin deployments with clientUploads enabled expose POST /api/cloudinary-generate-signature, whose handler in cloudinary/src/getGenerateSignature.ts passes attacker-controlled body.paramsToSign directly to cloudinary.utils.api_sign_request without a key allowlist, collection policy, timestamp freshness check, or configured-folder enforcement. Any authenticated Payload user can obtain a valid Cloudinary HMAC-SHA1 signature for unauthorized parameters such as overwrite, type, notification_url, invalidate, folder, and public_id. The signature can authorize asset replacement, upload visibility changes, callbacks to attacker-selected URLs, cache invalidation, and uploads outside the intended folder. The client-visible Cloudinary API key is expected by the upload design, but the unrestricted server-side signature supplies the authorization value needed to complete these operations. This vulnerability is fixed in 0.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jhb-software payload-plugins >= 0.3.0, < 0.4.0 -

II. Public POCs for CVE-2026-58200

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III. Intelligence Information for CVE-2026-58200

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Patches & Fixes for CVE-2026-58200 (2)

Vendor Advisories for CVE-2026-58200 (1)

Vendor Pages for CVE-2026-58200 (1)

IV. Related Vulnerabilities

Same product: payload-plugins
Same vendor: jhb-software
Same weakness: CWE-347

V. Comments for CVE-2026-58200

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