CVE-2026-58200 json
@jhb.software/payload-cloudinary-plugin: Arbitrary Cloudinary API Parameter Signing
published 2026-06-19 4 mo ago modified 2026-09-30 39 d ago also GHSA-h5x8-xp6m-x6q4 , EUVD-2026-78825
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm @jhb.software/payload-cloudinary-plugin 0.4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 54 d ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @jhb.software/payload-cloudinary-plugin | >=0.3.0, <0.4.0 |
0.4.0 |
Affected products
- jhb-software payload-plugins
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
- github.com /jhb-software/payload-plugins/pull/155
- github.com /jhb-software/payload-plugins/commit/da2325901c5eeced17d33a1b2e647e300b8cbff2
-
github.com
/jhb-software/payload-plugins/security/advisories/GHSA-h5x8-xp6m-x6q4
web
- github.com /jhb-software/payload-plugins/releases/tag/cloudinary@0.4.0
-
github.com
/jhb-software/payload-plugins
package
Sources
- CVE List CVE-2026-58200
- GitHub Advisory GHSA-h5x8-xp6m-x6q4
- NVD CVE-2026-58200
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